Showing posts with label Montana. Show all posts
Showing posts with label Montana. Show all posts

Fluoropolymer Heat Exchanger Application Guide

Fluoropolymer Heat Exchangers

Companies manufacturing or using ultra-corrosive fluids need corrosion-resistant materials for reliable processes. Fluoropolymer heat exchangers are used for dilution, condensation, boiling, cooling, and crystallization processes that require corrosion resistance.  

Common Fluoropolymer Heat Exchanger Applications:

  • Making or using dilute sulfuric acid, nitric acid, hydrochloric acid, and hydrofluoric acid
  • Acid recycling/regeneration
  • Metal finishing including galvanizing, plating, cleaning, and pickling
  • Producing chlor-alkali or caustic soda

By using our daily and daily heat exchangers with perfect efficiency, thousands of customers worldwide enjoy less operating costs. Using quality materials avoids expensive, unforeseen downtime, and replacement costs. 

AMETEK FPP manufacturers fluoropolymer heat exchangers that do not foul or scale, so they promise low maintenance costs and exceptional service life. What’s more, fluoropolymer materials are inert to nearly all chemicals, further enhancing their ability to operate long-term in ultrahigh purity applications.

Mountain States Engineering and Controls offers a catalog of fluoropolymer heat exchanger applications on their website, courtesy of AMETEK FPP. You can get the application reference guide here.

For more information about fluoropolymer heat exchangers in Colorado, Utah, Nevada, Wyoming, Montana, South and North Dakota, contact Mountain States Engineering and Controls. Call them at 303-232-4100 or visit their website at https://mnteng.com.

The CCS DualSnap 6900GE Industrial Pressure Switch

CCS 6900GE

The CCS DualSnap hazardous area 6900GE Series is the most widely accepted all-around all-aluminum pressure switch. The 6900GE is certified UL / CSA, Class I, Groups A, B, C and D, and Class II Groups E, F, and G. Rated NEMA 4X and IP66 for wet environments. 

Built with high vibration and shock resistance, the Dual Snap® disk spring technology guarantees high accuracy and repeatability. It comes with increased overpressure capabilities and yet relatively small in size for comfortable panel mounting.

CCS DualSnap 6900GEApplications include:

  • Oil & Gas
  • Power Generation
  • Fluid Management
  • Chemical Refining and Processing
  • Manufacturing Process
  • Utilities, Water Treatment and Waste
  • Safety Systems

For more information about the CCS DualSnap 6900GE contact Mountain States Engineering and Controls. Call them at 303-232-4100 or visit their website at https://mnteng.com.


Duo-Chek Check Valves Compared to Conventional Swing Check Valves

Duo-Chek® high performance non-slam check valves are available in the sizes, pressure classes and configurations required to meet the most demanding of applications. 

The Duo-Chek® wafer valve design is generally stronger, lighter, smaller, more efficient and less expensive than conventional swing check valves. Its design meets API 594, is approximately one fourth the face to face dimension and 15% to 20% the weight, on most popular sizes, making them less expensive than a swing check valve. It is much easier to install between standard gaskets and line flanges. The savings compound during installation due to ease in handling and only one set of flange studs is required. Therefore, it is more cost effective to install, and also to maintain.

For more information about Duo-Chek check valves, contact Mountain States Engineering and Controls. Call 303-232-4100 or visit  https://mnteng.com.

Mascot VFlo: V-Notch Segmented Ball Control Valve

Mascot VFlo

A Segmented Ball Valve from Mascot Valve

The VFlo – Segmented Ball Valve is designed to provide effective control for demanding applications. It is a rugged design segmented ball valve which overcomes the problems of harsh, particle entrained processes, and fibrous/unclean services. The VFlo also provides accurate, reliable control in a broad rang

Metal Seal: Using the pressure drop across the valve, flex-lock sealing energises the seal to bubble tight shutoff in either flow direction. ANSI class IV is achieved with a metal seal.

Soft & Dual Seal: Using the pressure drop across the valve for soft sealing as well, the VFlo energises the seal to bubble tight shutoff in either flow direction. ANSI class VI is achieved with a soft seal and ANSI class IV with a dual seal.

The Soft seal ring is standard for the VFlo and utilizes a 316 SS or Inconel Ring as a backup in conjunction with a Filled PTFE / PEEK seat. Such design provides for a quick and easy replacement in case of failure. The backup ring also provides shear action hence scraping any developments on the ball.

DOWNLOAD THE VFLO BROCHURE HERE

For more information about Mascot Valves, contact Mountain States Engineering and Controls. Call them at 303-232-4100 or visit their website at https://mnteng.com.

Considerations in Selecting Industrial Heat Exchangers

Standard-Xchange


The information below, courtesy of Standard-Xchange, outlines various design types of heat exchangers along with their advantages, limitations, and selection tips. For more information on applying heat exchangers to industrial process, contact Mountain States Engineering and Controls.

Non-Removable Bundle, Fixed Tubesheet

Advantages
  • Less costly than removable bundle heat exchangers
  • Provides maximum heat transfer surface per given shell and tube size
  • Provides multi-tube pass arrangements
  • Interchangeable with competitive models
Limitations
  • Shell side can be cleaned only by chemical means
  • No provisions to correct for differential thermal expansion between the shell and tubes. (Exception: expansion joint, available only on C200 and C210 exchangers)
Selection Tips
  • For lube and oil and hydraulic oil coolers, put the oil through the shell side
  • Corrosive or high fouling fluids should be put through the tube side
  • In general, put the coldest fluid through the tube side

Removable Bundle, Packed Floating Tubesheet

Advantages
  • Floating end allows for differential thermal expansion between the shell and tubes
  • Shell side can be steam or mechanically cleaned
  • Bundle can be easily repaired or replaced
  • Less costly than full interval floating head-type construction
  • Maximum surface per given shell and tube size for removable bundle designs
Limitations
  • Shell side fluids limited to non-volatile and/or non-toxic fluids, i.e., lube oils, hydraulic oils
  • Tube side arrangements limited to one or two passes Tubes expand as a group, not individually (as in U-tube unit); therefore, sudden shocking should be avoided
  • Packing limits design pressure and temperature
Selection Tips
  • For lube oil and hydraulic oil coolers, put the oil through the shell side
  • For air intercoolers and aftercoolers on compressors, put air through the tube side
  • Coolers with water through the tube side: clean or jacket water, use 3/8” tubes; raw water, use 5/8” or 3/4” tubes
  • Put hot shell side fluid through at stationary end (to keep temperature of packing as low as possible)

Removable Bundle, Pull-Through Bolted Internal Floating Head Cover

Advantages
  • Allows for differential thermal expansion between the shell and tubes
  • Bundle can be removed from shell for cleaning
  • or repairing, without removing the floating head cover
  • Provides multi-tube pass arrangements
  • Provides large bundle entrance area
  • Excellent for handling flammable and/or toxic fluids
Limitations
  • For given set of conditions, it is the most costly of all the basic types of heat exchanger designs
  • Less surface per given shell and tube size than C500
  • Selection Tips
  • If possible, put the fluid with the lowest heat transfer coefficient through the shell side
  • If possible, put the fluid with the highest working pressure through the tube side
  • If possible, put the high fouling fluid through the tube side

Removable Bundle, Internal Clamp Ring-Type Floating Head Cover

Advantages
  • Allows for differential thermal expansion between the shell and tubes
  • Excellent for handling flammable and/or toxic fluids
  • Provides multi-tube pass arrangements
Limitations
  • Shell cover, clamp-ring and gloating head cover must be removed prior to removing the bundle.
  • More costly than fixed tube sheet or U-tube heat exchanger designs
Selection Tips
  • If possible, put the fluid with the lowest heat transfer coefficient through the shell side
  • If possible, put the fluid with the highest working pressure through the tube side
  • If possible, put the high fouling fluid through the tube side

Removable Bundle, U-Tube

Advantages
  • Less costly than floating head or packing floating tubesheet designs
  • Provides multi-tube pass arrangements
  • Allows for differential thermal expansion between the shell and tubes, as well as between individual tubes
  • High surface per given shell and tube size
  • Capable of withstanding thermal shock
Limitations
  • Tube side can be cleaned only by chemical means
  • Individual tube replacement is difficult
  • Cannot be made single pass on tube side; therefore, true counter-current flow is not possible
  • Tube wall at U-bend is thinner than at straight portion of tube
  • Draining tube side is difficult in vertical (head-up) position
Selection Tips
  • For oil heaters, wherever possible put steam through the tube side to obtain the most economical size

Removable Partition Plates With Compression Endplates and Frame

Advantages
  • Ease of disassembly for cleaning or replacement parts
Limitations
  • Not Suitable for pressures over 300 psig
  • Not Suitable for change of state or gaseous applications
Selection Tips
  • For applications involving temperature crossing
  • Economical when exotic metals are required

Brazed Plate

Advantages
  • Very compact and rugged
  • Lightweight
  • Many design options, including multiple passes, different plate styles, nozzle sizes and orientation
  • High heat transfer performance
No gaskets
  • Limitations
  • Can only be cleaned chemically
Selection Tips
  • For applications involving temperature crossing or close temperature approach
  • Ideal for refrigerant-to-liquid or refrigerant-to-gas applications
  • Very economical when compared to all-stainless tubular construction

Heavy Duty Removable Core Type

Advantages
  • Tubes free to expand individually
  • Heating elements totally removable for maintenance or replacement without disconnecting outer casing from ductwork
  • Embedded or extruded fins available for higher design temperatures (750° F max.)
Limitations
  • Individual tubes cannot be cleaned or plugged

303-232-4100

Understanding Pigging and Pig Valves in Industrial Pipelines


Pigging is a method of introducing a mechanical device, commonly referred to as pigs or scrapers, inside a pipeline to perform various internal maintenance operations.The term PIG is said to be an acronym for "Pipeline Intervention Gadget". The process has been used for many years to scrub large diameter pipelines in the oil and gas industry. Today, the use of smaller diameter pigging systems is growing in many continuous and batch processing plants, as plant operators are looking for improved productivity and ways to reduce costs. 

Pig valves were successfully implemented into the oil and gas industry over five decades ago.  They are used extensively on oil and gas pipelines throughout Western Canada and the United States. They provide an efficient way to launch and retrieve pigs in the oil and gas industry, water treatment facilities, or anywhere critical pipelines need to be maintained.

Pigging is used to mechanically sweep and/or visually inspect inside of the pipeline. The pig or scraper is moved through the line by the differential pressure caused by the process fluid moving past at a higher velocity. The pig is inserted into what is known as a "pig launcher" (or launching station) which is a part of the pipeline with an oversized diameter to accomodate the installation of the pig. The launching station is then closed and the pressure driven flow in the pipeline is used to move the pig down the pipe until it reaches the receiving trap (the pig catcher or receiving station) where it can be removed. Pigs are used daily in the operation of pipelines for a variety of reasons, the most common are: pipe cleaning for improved line efficiency; locating flow obstructions; pipeline inspection; separating different products flowing through the pipeline; corrosion control; air purge; water removal; and flow volume validation.

For more information about pigging valves, contact Mountain States Engineering and Controls. Call them at 303-232-4100 or visit https://mnteng.com/pig-valve.

CavFlo Cavitation Control Valve Trim by MASCOT


Whenever the pressure of flowing liquid through a restricted area of a control valve drops below the vapor pressure of the liquid, and recovers to a pressure above the vapor pressure, cavitation damage to the control valve and connecting piping may occur. 

In the first stage of cavitation, vapor bubbles form downstream of the restricted area at the vena contracta (point of narrowest fluid constraint). The enlarging passage at downstream of the vena contracta reduces the velocity and thereby associated pressure recovery causes the vapor bubbles collapse or implode suddenly.

This implosion of the bubbles on metal surfaces causes stresses, eventually resulting in tearing away particles of the metal from the surface towards inward. Cavitation damages the plug and seat of a control valve as throttling occurs at the restriction, in the clearance between the plug and seat ring. If the vapor bubbles implode near them, the valve body and piping can also be damaged.

MASCOT's CavFlo Trim utilizes many small holes for diametrical flow through the walls of the seat retainer. As the valve plug lifts, increasing pairs of holes are opened. Each hole discharges a jet of cavitating liquid at the center of the retainer, which impinges with a jet of liquid admitted through the opposing hole. The impinging fluid jets form an area of pressure recovery and a fluid cushion. This phenomenon collapses the vapor bubbles in the fluid stream, away from metal parts preventing damages.

For more information about MASCOT Control Valves, contact Mountain States Engineering and Controls. Call them at (303) 232-4100 or visit their website at https://mnteng.com.

New Product Line! Mascot Valves. High Quality. Competitive Prices. Large US Inventory

Mascot ValvesMountain States Engineering and Controls is pleased to announce the addition of MASCOT Valves to our product line. MASCOT maintains a large USA based inventory in Channelview, TX for fast product delivery. MASCOT's superior quality is driven by complete in-house manufacturing, assembly, and testing, along with full material traceability and extensive quality procedures, to assure that MASCOT products provide you with superior performance and a competitive price.

DOWNLOAD THE MASCOT VALVE PRODUCT CATALOG HERE

For more information about MASCOT Valves, contact Mountain States Engineering and Controls. Call us at 303-232-4100 or visit our website at https://mnteng.com.

Don't Let Contaminated Steam Affect Your Food and Beverage Production Quality


You wouldn’t use unsafe ingredients in your products. But are you contaminating them with unsafe steam. Steam is the most efficient method of heating in food and drink processes. But when steam is in direct contact with food contaminants like particles of rust, dirt and chemicals could end up in your products and your consumers. Product recalls, tarnished brand reputation, and plunging consumer loyalty will all impact your bottom line. So why take the risk?

To protect your consumers and guarantee product quality, you must treat steam as you would any other ingredient and ensure it's safe to consume. It doesn't have to be hard. Spirax Sarco, and Mountain States Engineering and Controls can help you find the right standard of steam for your process and put measures in place to keep standards high. We can help you adopt best practices in steam system design and improve steam quality, install filtration around your steam system to mitigate the risk, and install a dedicated clean steam supply to eliminate the contamination risk.

To learn more about Spirax Sarco products, contact Mountain States Engineering and Controls by calling 303-232-4100 or by visiting https://mnteng.com.

Cross Reference Guide for Steam Traps, Regulators, and Pressure Pumps from Watson McDaniel

McDaniel Company is a U.S. manufacturer of steam traps, pressure pumps, pressure and temperature regulators, relief valves, liquid drainers, ejectors, engineered systems, and a variety of specialty steam products.

They have assembled a handy cross reference chart for major manufacturers of steam traps, temperature regulators, pressure pumps, and other steam related process equipment.


DOWNLOAD THE CROSS REFERENCE GUIDE FROM THIS MSEC WEB PAGE


For more information on steam traps, temperature regulators, condensate recovery, and process heat, contact Mountain States Engineering and Controls. Call them at 303-232-4100 or visit them at https://mnteng.com.

Flo-Tite Sentinel Segmented Control Valve for Severe Service Applications


The Flo-Tite Sentinel is an ideal control valve for severe service applications where precise control is required for clean or dirty liquids, gases, and fibrous suspension applications.

Precise contouring of the V-notch provides excellent control characteristics for an extensive variety of flow applications. An ideal control performance is designed into the geometry of the ball for critical management of flow. A locked ball-to-shaft connection ensures no lost motion during critical control.

Splined connection between the shaft and ball ensures precise control and low hysteresis. Streamlined flow passage provides maximum efficiency and minimizes erosion inside the valve body.

Detachable seat retainer design provides easy access to trim parts of the valves through inlet of valve by simply removing the screws of retainer allowing for easy maintenance. Superior trunnion bearing technology is engineered for excellent abrasion resistance.

Rugged self-adjusting metal seated option is ideally suited for higher temperature applications or slurries. Spring loaded seat maintains constant contact with the ball, providing enhanced sealing performance. Shearing action between ball and seat promotes smooth, non-clogging operation, perfect for fibrous or slurry applications.

For more infomration, contact Mountain States Engineering and Controls. Call them at 303-232-4100 or visit their web site at https://mnteng.com.

Understanding the Various Kinds of Steam Traps

Steam Trap

It is essential, without loss of live steam, to remove condensate and often air and other incondensable gases from steam systems. Knowing the range of steam traps allows the best choice to be made for all applications. 

Thermodynamic steam traps

Thermodynamic steam traps combine reliability, simplicity and efficiency of operation; with just one moving part (a hardened stainless steel disc) they give a blast discharge with clean, tight shut-off. They are able to withstand: superheat, water hammer, corrosive condensate, freezing and vibration. 

Ball float steam traps

Ball float steam traps are extremely versatile and work efficiently on both light and heavy condensate loads. Although compact in size, their discharge capacity is high and continuous, ensuring maximum heat transfer. These traps are the best choice for draining plant with automatic temperature control.
An integral air vent is fitted as standard and an adjustable needle valve is available as an option to prevent steam locking.

Balanced pressure thermostatic steam traps

Balanced pressure thermostatic steam traps adjust automatically to varying steam pressures and have excellent air venting characteristics during plant start-up and during normal operation. They have large discharge capacities for their size and the robust design of the internals gives a good life expectancy.

Sealed steam traps

Sealed maintenance free steam traps.
Range: balanced pressure, inverted bucket and bimetallic versions.

Inverted bucket steam traps

Inverted bucket traps are the most robust type of the mechanical traps and will resist water hammer. When the check valve option has been fitted in the inlet, they can be used with superheated steam. They are available with a wide selection of valve orifices for precise pressure and load matching.

Bimetallic thermostatic steam traps

Bimetallic steam traps can conserve energy by discharging sub-cooled condensate in those applications which can utilize sensible heat. They are the most robust of all the thermostatic steam traps, being able to withstand water hammer and corrosive condensate.

For more on steam traps and condensate recovery, or for other Spirax Sarco products, contact Mountain States Engineering and Controls. Call them at 303-232-4100 or visit their web site at https://mnteng.com.

Valve Actuator Basics

Valve actuators are categorized based upon a number of factors including power source available,  torque necessary to operate the valve, installation location,  and the need for automatic actuation.  Actuators are devices which supply the force and motion to open and close valves. They can be manually, pneumatically, hydraulically, or electrically operated. In common industrial usage, the term actuator generally refers to a device which employs a non-human power source and can respond to a controlling signal.

Types of actuators include:
  • Electrical motor
  • Pneumatic
  • Hydraulic
  • Manual handwheel or lever

Electric Actuators
Electric Actuator
Electric Actuator

Electric motors permit manual, semi-automatic, and automatic operation of the valve. Motors are used mostly for open-close functions, although they are adaptable to positioning the valve to any point opening. The motor is usually a, reversible, high speed type connected through a gear train to reduce the motor speed and thereby increase the torque at the stem. Direction of motor rotation determines direction of disk motion. The electrical actuation can be semi-automatic, as when the motor is started by a control system. A handwheel, which can be engaged to the gear train, provides for manual operating of the valve. Limit switches are normally provided to stop the motor automatically at full open and full closed valve positions. Limit switches are operated either physically by position of the valve or torsionally by torque of the motor.

Pneumatic Actuator
Pneumatic Actuator

Pneumatic Actuators

Pneumatic actuators are used for automatic or semi-automatic valve operation. These actuators translate an air signal into valve stem motion by air pressure acting on a diaphragm or piston connected to the stem. Pneumatic actuators are used in throttle valves for open-close positioning where fast action is required. When air pressure closes the valve and spring action opens the valve, the actuator is termed direct-acting. When air pressure opens the valve and spring action closes the valve, the actuator is termed reverse-acting. Duplex actuators have air supplied to both sides of the diaphragm. The differential pressure across the diaphragm positions the valve stem. Automatic operation is provided when the air signals are automatically controlled by circuitry. Semi-automatic operation is provided by manual switches in the circuitry to the air control valves.

Hydraulic Actuators

Hydraulic Actuator
Hydraulic Actuator
Hydraulic actuators provide for semi-automatic or automatic positioning of the valve, similar to the pneumatic actuators. These actuators use a piston to convert a signal pressure into valve stem motion. Hydraulic fluid is fed to either side of the piston while the other side is drained or bled. Water or oil is used as the hydraulic fluid. Solenoid valves are typically used for automatic control of the hydraulic fluid to direct either opening or closing of the valve. Manual valves can also be used for controlling the hydraulic fluid; thus providing semi-automatic operation.

Manual Actuators
Manual Actuator
Manual Operator

Manual actuators are capable of placing the valve in any position but do not permit automatic operation. The most common type mechanical actuator is the handwheel. This type includes handwheels fixed to the stem, hammer handwheels, and handwheels connected to the stem through gears.

Gear Operators

If additional mechanical advantage is necessary for a manually-operated valve, the valve bonnet is fitted with manually-operated gear heads as illustrated in Figure 32. A special wrench or handwheel attached to the pinion shaft permits one individual to operate the valve when two individuals might be needed without the gear advantage. Because several turns of the pinion are necessary to produce one turn of the valve stem, the operating time of large valves is exceptionally long. The use of portable air motors connected to the pinion shaft decreases the valve operating time.

For more information about industrial valves and valve automation, contact Mountain States Engineering and Controls by calling 303-232-4100 or visit their web site at https://mnteng.com.

Spirax Sarco Steam Trap Handbook

Download the Steam Trap Handbook Here
Removing condensate and air from your system is essential. Returning condensate to the boiler house maximizes use of energy. Spirax Sarco the right steam trap for your application and Mountain States Engineering and Controls has the right people to advise you. Products include:

BALANCED PRESSURE STEAM TRAPS

Balanced pressure thermostatic steam traps adjust automatically to varying steam pressures.

BIMETALLIC STEAM TRAPS

Bimetallic steam traps can conserve energy by discharging sub-cooled condensate in those applications which utilize sensible heat.

FAULT DETECTION

Our solutions for effective steam trap management.

FLOAT AND THERMOSTATIC STEAM TRAPS

Extremely versatile traps that work efficiently on both light and heavy condensate loads.

INVERTED BUCKET STEAM TRAPS

Inverted bucket traps are the most robust type of the mechanical traps.

LIQUID EXPANSION STEAM TRAPS

The liquid expansion steam trap employs a liquid expansion device to discharge condensate at a predefined temperature.

MANIFOLDS

The modern method of manifolding is to purchase the manifold as a standard piece of equipment just like buying a steam trap.

SEALED STEAM TRAPS

Replacement sealed traps utilize a non-remakeable joint, eliminating the risk of leaks to atmosphere.

SWIVEL CONNECTORS AND TRAPS

Our range of connectors significantly reduce installation time, cuts costs dramatically, and eliminate system leaks.

THERMODYNAMIC STEAM TRAPS

Thermodynamic steam traps combine reliability, simplicity and efficiency of operation.

For more information, contact:
Mountain States Engineering and Controls
600 Corporate Circle, Suite F
Golden, CO 80401
303.232.4100 Phone
303.232.4900 Fax
https://mnteng.com

An Introduction to VSI Controls: Process Control Valves


VSI Controls, a wholly-owned subsidiary of PetrolValves, offers customers general and severe service rotary and reciprocating control valve systems that provide a best-fit solution for their processes.

VSI Controls' valve offering includes Reciprocating Globe, Angle and Three-Way, Rotary Eccentric Plug, Double and Triple Offset Butterfly, Segmented V-Ball, Specialty Ball, Desuperheaters and Regulators. All are provided with Double-acting spring return actuators and advanced digital positioners and provide the thrust, speed, accuracy and response to handle the most exacting applications.

The video above introduces the viewer to the various VSI Controls control valve models.

Mountain States Engineering and Controls is a proud VSI Controls sales channel partner and can assist you with your control valve application in the states of Colorado, New Mexico, Wyoming, Montana, Utah, Nevada, Idaho, Western North Dakota, and Western South Dakota.

Mountain States Engineering and Controls
600 Corporate Circle, Suite F
Golden, CO 80401
303.232.4100 Phone
303.232.4900 Fax
https://mnteng.com

Basic Control Theory Tutorial

Basic control theoryThis basic control theory tutorial looks at on/off and continuous control modes. It introduces proportional, integral and derivative control actions and explains some of the terminology. Courtesy of Spirax Sarco and Mountain States Engineering and Controls.

Topics Include:
  • On/off control
  • Continuous control
  • Proportional control
  • The effect of adjusting the Proportional-band
  • Reverse or direct acting control signal
  • Gain line offset or proportional effect
  • Manual reset
  • Overshoot and ‘wind up’
  • Derivative control - rate action
  • PID controllers
  • Hunting
  • Lag
  • Rangeability
  • Turndown ratio


Introduction to Gas Pipeline Block Station Valves

Gas Pipeline

When a gas pipeline is constructed it is divided up into segments using block valve stations. This enables various sections to be isolated for inspection and maintenance. The block valve is typically a full-bore, soft seated ball valve to allow for "pigging", a practice that includes cleaning and inspecting the pipeline. However, it is not recommended that soft seated ball valves be opened against full differential pressure as damage to the valve seats can occur. To mitigate valve seat damage, a bypass system is installed around the main block valve to balance the pipeline pressure prior to opening. For these bypass requirements, plug valves are commonly used because their inherent design tolerates full differential pressure and allows for the opening and throttling without damage.

Why You Need a Bypass 

Full port ball valve
Full port ball valve
For any given section of pipeline, the block station valve opening process begins after completion of inspection and/or maintenance has been completed and this section is now ready to be returned to service. 

Because the block valve (often is a soft seated ball valve) is exposed to full differential pressure, it faces a huge pressure drop across the valve as it opens. The pressure drop generates high velocity flow, very often accompanied by scale, rust and dirt particles. These particles come in contact with the valve seats resulting in seat erosion and damage. Once the valve seats are damaged, the block valve cannot seal bubble tight once closed. To avoid the block valve seats from being exposed to high velocity, erosive particles, a bypass is utilized to balance the pressure either side of the block valve prior to the opening of the block valve.

Prevention of Block Valve Seat Deterioration Using Bypass Valves

plug valve
Plug valve (CRANE Xomox)
A typical bypass system includes two (2) bypass valves and One (1) vent valve. With the vent valve closed, the first of two bypass valves (Bypass Valve 1) is opened allowing pressure into the bypass piping. Usually, a plug valve is be used because it can tolerate full differential pressure without seat damage. Next, bypass the second bypass valve (Bypass Valve 2) is slowly opened, gradually building pressure in the downstream section of the pipeline until the pressure either side of the main block valve is equalized. Plug valves are also commonly used here because they are capable of controlling the flow without seat damaged.

With the pressure now equalized in the pipeline, the block valve can be opened safely, without the risk of seat damage. Bypass valves 1 & 2 have done their jobs and are now fully closed, providing bubble tight shutoff for the main pipeline.

Pipeline Venting to Atmosphere

Block stations are required occasionally vent a section of the pipeline to atmosphere. This too is a demanding application, with the valve being  exposed to full differential pressure. This operation starts with all valves in the system being closed. Bypass valve 1 is then opened allowing pressure into the bypass station system. The vent valve is now slowly opened to release the pipeline pressure.  Plug valves are commonly used here again to ensure bubble tight isolation to the atmosphere once closed.

For more information, contact Mountain States Engineering and Controls by visiting https://mnteng.com or by calling 303-232-4100.

VSI Controls Full Control Valve Product Catalog

VSI Controls
VSI Controls™, a leading international control valve company and wholly-owned subsidiary of PetrolValves™, offers Customers an exciting alternative to procure severe service rotary and reciprocating control valve systems that provide a best-fit solution for their processes.

The design, geometry and shapes of the products, together with the use of noble materials, modern casting processes and advanced assembly and test technology, differentiate VSI Controls™ in applications such as: superheated steam, high differential pressures, volatile, corrosive, dirty and erosive fluids, as well as solutions to eliminate cavitation and aerodynamic noise issues.

VSI Controls™ - through the manufacturing and technical prowess of PetroIVaIves™ - provides the highest quality control valves systems and complements the product offering of PetrolValves™ manual & automated on-off valves and Mokveld™ axial control, check and choke valves.


For more information on VSI Controls products, contact Mountain State Engineering and Controls by calling 303-232-4100 or visit their website at https://mnteng.com.

CRANE Valves in Stock at Mountain States Engineering & Controls


Mountain States Engineering & Controls stocks Crane gate, globe, check and ball valves in their new warehouse in Golden, CO. They have Crane forged steel, cast steel, cast iron, bronze gate, globes and check valves up to 12”.   They also have carbon steel, stainless steel  and brass ball valves ¼” through 2”, as well as carbon steel and stainless steel Duo-Chek check valves up to 16”.

For more information, contact Mountain States Engineering & Controls.
https://mnteng.com
303-232-4100

PTFE Lined Valves Designed for High Corrosion, High Purity

The Max Seal Chem-Flo Series of industrial line butterfly valve are fully lined PTFE lever operated butterfly valves suitable for use with acidic and base media. The Max Seal Chem-Flo butterfly valves offer reliable corrosion resistance when exposed to aggressive chemicals where corrosion is a concern. The Chem-Flo Series is available in wafer or lugged styles and offer bidirectional, bubble-tight shutoff.

Models:

  • 25 - Wafer Type
  • 26 - Lug Type
  • Size Range 2" - 12"
  • Ductile Iron Body
  • Optional Stainless Steel
  • And Special Alloys

Pressure Rating:

2" - 14": 150 PSI
16" - 24": 100 PSI


Actuator Mounting

  • ISO - 5211 Direct Mount

Design Advantages

  • Ease of Automation
  • Low Operating Torque
  • Blow-Out Proof Stem
  • 2 Piece Body Design
  • Epoxy Coated Body
  • Optional Polished Disc
  • Phenolic Backed Seat
  • 2 Piece Stem Design 

For more information, contact Mountain States Engineering and Controls by calling 303-232-4100 or by visiting https://mnteng.com.