Products/Services for Dashpot Check Valves
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Check Valves - (1951 companies)Check valves are self-activating safety valves that permit gases and liquids to flow in only one direction, preventing process flow from reversing. They are classified as one-way directional valves. Fluid flow in the desired direction opens...Valve TypeSevere Service RatedBack Flow Preventer Assembly -
Shock Absorbers, Linear Dampers, and Dashpots - (290 companies)...absorbers, linear dampers, or dashpots have an adjustment style for gas shocks in which gas is let out to permanently reduce force capacity. Locking configurations can lock the position at the end or in the middle of stroke. Valves can be included... -
Mechanical Timers - (73 companies)...timers open and close a circuit based on the position of internal or external clockwork. Spring-driven timers use a spring and trip lever to generate mechanical action. Dashpot timers pass compressed air or hydraulic fluid into or out of a contained... -
Hydraulic Valves - (684 companies)...of Hydraulic Valves. Hydraulic valves can be almost any valve, i.e., check valve, drain valve, control valve, and many more, as long as the valve restricts hydraulic fluid they can be classified as hydraulic valves. For a full description on types... -
Gas Valves - (535 companies)...requirements. Gas valves are available in most of the basic valve technologies such as ball, butterfly, plug, needle, and various check valve designs. They are used in many industrial, commercial and residential applications for on/off, modulating, and control... -
Globe Valves - (794 companies)...23. Self-actuated valves use the system fluid to position the valve. These are commonly found in relief valves, safety valves, check valves, and steam traps. Because these actuators use the fluid in the system, no external power is required...
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Ball Valves - (2114 companies)...for chemical or non-sterile applications. See GlobalSpec's Valve Application and Valve Standards pages for more information. Features. Ball valve manufacturers have ball valves available with several different features to fit an application. Swing check...
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Butterfly Valves - (1270 companies)These are commonly found in relief valves, safety valves, check valves, and steam traps. Because these actuators use the fluid in the system, no external power is required. Speed of Power Actuators. Actuators can vary in operating speed. The speed...
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Control Valves - (1646 companies)...standards, and Federal specification WW-V-35C. Check with manufacturer for exact listings. Some control valves may come configured as a multi-piece design. Applications. Common applications for control valves include general purpose, process control...
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Air Valves - (794 companies)...include stopping and starting flow, throttling (control) flow, and acting as a non-return check for flow (check). Stop/Start valves are used for systems that do not need the flow throttled. The valve opens to allow the flow and closes to stop flow...
Product News
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DeZURIK, Inc.
Maximize Performance of Check Valves These key considerations will extend the life of the check valve, ensure proper protection of process equipment, and prevent an unplanned shutdown. For more information visit DeZURIK.com. (read more)Browse Industrial Valves Datasheets for DeZURIK, Inc. -
DFT Inc.
Check Valves in Semiconductor Fabrication Check Valves in Semiconductor Fabrication. To manufacture semiconductors, fabs require significant amounts of water and steam. Check valves are critical components on a pump 's discharge in the fluid systems that deliver or transport these materials. DFT valves ensure tight seals, offering reliable protection against backflow while enabling smooth and efficient fluid flow. Learn More in Our Semiconductor Check Valves Blog Post (read more)Browse Check Valves Datasheets for DFT Inc. -
Lee Co. (The)
LEE CHECK VALVES The Lee Company manufactures a wide variety of miniature, pre-tested cartridge check valves that offer proven reliability and performance. With almost one million valves successfully in service, some for over 20 years, Lee check valves set the standard for small size, light weight and proven reliability. Four types of miniature check valves are available: Axial Flow Check Valves. Side Exit Check Valves. Zero Leak Check Valves. Pilot Operated Check Valves. Axial Flow Check Valves. Lee Chek (R) O... (read more)Browse Check Valves Datasheets for Lee Co. (The) -
Lee Co. (The)
Cryogenic Check Valve The Cryogenic Check Valve incorporates fitting ends per AS standards, making it easy to integrate into existing systems. The valve 's materials were carefully selected for their compatibility with hydrogen and other fluids used at cryogenic temperatures. In addition, the valve 's adaptable construction supports material changes to suit a wide range of environments. Key Features of the Cryogenic Check Valve: Temperature range: -320 F to 275 F. Pressure rating: up to 5000?psi. Leakage: <10?SCCM... (read more)Browse Check Valves Datasheets for Lee Co. (The) -
McWane Plant and Industrial
Understanding Swing Check Valves Swing check valves are probably the most misunderstood valve in. the municipal water works industry. What causes a check valve to. slam? How can we prevent it? How does the design of a swing check. valve make it susceptible to slam? Why are there so many closure. devices available?. To answer those questions, we need to understand the problems of. water hammer and valve slamming, the general design of a swing. check valve, and the pros and cons of each type of closure device. available... (read more)Browse Check Valves Datasheets for McWane Plant and Industrial -
DFT Inc.
Understanding Check Valves: Webinar by DFT Choosing the right check valve is critical to a properly designed process system. The right check valve not only improves overall system reliability, it also lowers maintenance costs in the long term. This on-demand presentation explains the fundamental differences between the many styles of check valves. Attendees will learn about sizing a check valve to ensure proper flow, increase efficiency, and reduce total cost of ownership. KEY TAKE-AWAYS: Learn about the many types and styles of check... (read more)Browse Check Valves Datasheets for DFT Inc. -
DFT Inc.
DFT Check Valves for Demanding Applications The DFT (R) model Excalibur (R) and GLC (R) Check Valves are center guided, spring-assisted, dependable, in-line check valves for a wide range of applications. These Check Valves provide tight shut-off to protect other equipment in the system from water hammer in liquid, gas, or steam services. Built for reliability, longevity, and low maintenance, the GLC and Excalibur Check Valves are not susceptible to the failures experienced with swing checks due to the slamming of the disc against... (read more)Browse Industrial Valves Datasheets for DFT Inc. -
Parker Sporlan Division
Aftermarket Spring-Loaded Check Valves Copper Ball Spring-Loaded Check Valves. Parker 's Copper Ball Spring-Loaded Check Valves are used in refrigeration and air conditioning systems to maintain flow in only one direction. Internal components seat or "check ", preventing flow back through the valve. This check valve can be installed in the following applications: * In conjunction with filter driers, strainers, or other devices to ensure unidirectional flow. * In conjunction with compressors to prevent liquid refrigerant from... (read more)Browse Control Valves Datasheets for Parker Sporlan Division -
DeZURIK, Inc.
Tideflex® Check Valves for Backflow Prevention Introducing the Tideflex (R) Duckbill Check Valve - the gold standard in backflow prevention. With an unrivaled reputation, Tideflex (R) Duckbill Check Valves boast a low cracking pressure, effectively eliminating standing water while maintaining minimal head loss. Constructed entirely from elastomer, they're impervious to warping or freezing, and corrosion is a thing of the past. What sets Tideflex (R) Duckbill Check Valves apart is their self-operating design, relying solely on line pressure... (read more)Browse Check Valves Datasheets for DeZURIK, Inc. -
DFT Inc.
DFT® check valves for chemical manufacturing Featuring 2 of DFT 's high performing check valves, the Excalibur (R) flanged check valve and the WLC (R) wafer check built for use in refinery and chemical applications. Both have a tight seal, protect other equipment in the system from reverse flow, and are designed for low maintenance with a long service life. They can be utilized in liquid, gas, and steam applications and installed horizontally or vertically. Custom sizing is available for your specific flow conditions or for low flow... (read more)Browse Check Valves Datasheets for DFT Inc.
More Information
Indicates content that may require registration and/or purchase.
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Fast Flux Test Facility primary sodium valves
Foster Wheeler Energy Corporation, "Cold Leg Check Valve Dashpot Develop- ment Test for FFTF," Research Division Report SM-75-3, Revision 1.
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Pump Handbook, Fourth Edition > WATERHAMMER
Since the line length between the pump and air chamber is usually quite short, check valve slamming may occur, necessitating the consideration of a dashpot on the check valve to cushion closure.
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Hydraulic Design Handbook > HYDRAULIC TRANSIENT DESIGN FOR PIPELINE SYSTEMS
Since the line length between the pump and air chamber is usually quite short, check valve slamming may occur, necessitating the consideration of a dashpot on the check valve to cushion closure.
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Applied Hydraulic Transients
A check valve having no dashpot and having negligible bearing friction losses closes [Parmley, 1965] according to the equation .
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FAST FLUX TEST FACILITY QUARTERLY TECHNICAL REPORT, MARCH--MAY 1969.
Nodal Arrangement - Typical for Each Section Temperature Distribution for Unbalanced Flow High Secondary-Low Tertiary Flow (3.48:l.O) Angular Displacement Versus Time Diagram for a Standard Tilting Disk Check Valve Which Illustrates the Effect of Dashpot Stiffness on Valve Closing …
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Fast reactor safety and related physics. Volume II. Licensing; safety-related design
Performance tests of a full-size primary check valve were performed in a water loop under reverse flow conditions to optimize dashpot stroke and damping ratio.
