The Silent Check Valve was designed to open at approximately ¼ to ½ psi (2-3 kPa). This means that when a pump is shut down, a Silent Check Valve will completely close while there is still positive head on the inlet side of approximately ½ psi (3 kPa). In this simple manner reverse flow, which is a major cause of water hammer, is prevented.

Check valves with fixed cracking pressures, C, CP, and CH series, are cycled six times prior to testing . Every valve is tested to ensure it seals within 5 

Each of these DFT check valves addresses the particular needs of today's customer. DFT's objective is to diagnose check valve problems, provide solutions and 

Right Angle Check Valves These valves allow free flow in one direction and prevent flow in the reverse direction. Cracking pressure specified is the pressure required to open the valve and allow free flow. Specifications Model Number Designation Model Numbers Rated Flow * L/min Max. Operating Press. Kgf/cm 2 Cracking Pres. Kgf/cm 2 Mass Kg

detectable flow is measured. range would be 16 to 20 psig (1.10 to 1.38 bar). Check valves Re-seal pressure is defined as the downstream pressure at which the having springs with rated crack pressures of 3 psig (0.21 bar) or check valve closes bubble-tight. less may require up to 4 psig (0.28 bar) back pressure to re-seal bubble-tight.

check valves Check Valves Index 100 Series 1 200/H200 Series 3 2200 Series 9 2300 Series 11 C200 Series 15 C2900 Series 17 400/H400 Series 19 BIVCO Check Valves 23 Circle Seal Controls 2301 Wardlow Circle • Corona, CA 92880 Phone (951) 270-6200 • Fax (951) 270-6201 www.circlesealcontrols.com

The “flapperless” design is gentle on the seat as the piston rises and lowers with increased and decreased flow rates. SCV Dual Plate Check Valve design 

Nozzle Check Valve Silent Check Valve categories of check valves, Lift, Swing, and Dashpot‐Assisted are each designed with unique features for specific applications and each

The stop-check valve can then be used for isolation, regulation and prevention of backflow. Stop-Check Globe Valves STOP-CHECK PERFORMANCES 17 OTHER MODELS AVAILABLE Code: 62 Type: Globe Stopcheck Bonnet: Bolted Handling: OS&Y Sizes: 1/2" - 24" ANSI Class: 150-2500 Code: 61 Type: Globe Stopcheck Bonnet: Threaded & Welded Handling: OS&Y

FLANGED VALVES The DFT® Model PDC Check Valve. is a silent, non-slam check valve specially designed for use on the discharge side of reciprocating air or gas compressors. It includes a pulse-damping chamber to maintain the disc in the open position during the momentary reductions in flow associated with each cycle of a reciprocating

The DUAL PLATE WAFER CHECK valve LUG type covers the bolt along the entire length of the body. LUG type valves are supplied in scallop to keep the weight as low as possible, thereby minimizing the cost. LUG type valves are supplied with straight-through bores according to API-594. Note: 1. For more information contact the company.

detectable flow is measured. range would be 16 to 20 psig (1.10 to 1.38 bar). Check valves Re-seal pressure is defined as the downstream pressure at which the having springs with rated crack pressures of 3 psig (0.21 bar) or check valve closes bubble-tight. less may require up to 4 psig (0.28 bar) back pressure to re-seal bubble-tight.

Swing Check Valves Description: Bolted cover check valves Swing type Non-return BS1868 API6D ASME B16.34 API600 Design Standards: Wall Thickness: Face to Face: End

FireLock™ Series 717 Check Valve. Features an elastomer encapsulated disc with an electroless nickel plated seat. Sizes from 2½ - 12″ | DN65 - DN300. Pressures up to 365 psi | 2517 kPa | 25 bar. General Questions?

CVH Check Valves Guided poppet design and precision ground surfaces for The DMIC Check Valve is a quality leader in the worldwide CVH marketplace. Computer optimized flow passages and super heavy duty construction results in a 10,000 PSI rated product which will provide greatly extended service in 3,000 and 5,000 PSI applications.

The Silent Check Valve was designed to open at approximately ¼ to ½ psi (2-3 kPa). This means that when a pump is shut down, a Silent Check Valve will completely close while there is still positive head on the inlet side of approximately ½ psi (3 kPa). In this simple manner reverse flow, which is a major cause of water hammer, is prevented.

Ball Check Valves are simple and compact and commonly used on small water or wastewater pumps where economy is important. A Ball Check. Valve consists of a 

Parker C Series Check Valves are designed for uni-directional flow control of fluids and gases in industries such as chemical processing, oil and gas production and transmission, pharmaceutical, pulp and paper, power and utilities. Flow Calculations with 1000 psig (69 bar) Inlet Pressure Valve Series Maximum C V Pressure Drop

Check Valve BS 1868* API 603 Gate Valve API 603 ASME B16.34 Gate, Globe, Check Valves ASME B16.34 ASME B16.34 Face-to-face / End-to-end dimension ASME B16.10 End Flange dimensions ASME B16.5** Butt-weld End dimensions ASME B16.25 Valve Inspection & Testing API 600, API 598, BS 6755 Part I 20 L&T Cryogenic Valves L&T Cryogenic Gate & Globe Valves

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Swing Check Valves Description: Bolted cover check valves Swing type Non-return BS1868 API6D ASME B16.34 API600 Design Standards: Wall Thickness: Face to Face: End Connection: ANSI B16.10 Raised face Ring type joint ANSI B16.5 ASME B16.47 series A or B BS4504 PN16, 25, 40, 64, etc

The main purpose of the DUAL PLATE WAFER CHECK valve is to perform the work of almost any conventional valve. However, being smaller makes it lighter and, therefore, is more cost efficient to purchase, install and maintain. It is also a silent check valve; because of it's innovative design, it does not slam upon closing.

Nov 11,  · As mentioned above, a check valve, also called a non-return valve, reflux valve, or one-way valve is a valve that normally allows fluid (liquid or gas) to flow through it in one

Check to see that all valve joints and pressure containing bolts are tight. Leave the valve exposed while the pipeline is being pressurized. Rel.6/18/ Page 4 KENNEDY VALVE Plant and Industrial Group 1021 East Water Street Elmira, New York 14901 Telephone (607) 734-2211 Fax (607) 734-3288 CHECK VALVE RECOMMENDED STORAGE AND HANDLING

Inline Check Valve INLET: 1/4" NPT to ASME .201 74.2 mm 75.4 mm MATERIALS LIST OUTLET: 1/4" NPT Male to ASME Bl.201 Size inch 1/4 1/2 22 HEX INLET: 1/2" NPT to ASME 131.201 FLOW DIAGRAM pROCESS DTC Value 0.8 1.2 No. Part Name Bod Packin Ball Seat S rin Bod Material 316ss 304ss 316ss Inconel X-750 316ss DESIGN FEATURES

valves are typically used in controlling the rate of decompression in a large press before shifting the main valve. Pilot operated valves, like direct operated valves, permit free flow in one direction and prevent flow in the reverse direction. However, pilot operated valves permit reverse flow when a pilot pressure signal is applied to the