Catalogo Valvula De Retencion

Twin Plate Check Valves

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valves & controls

FloCheck is a precision engineered, twin plate check valve suitable for product or service lines, wherever non-return protection is required.

Features
• Twin plate, flat seat design for enhanced sealing. • Wafer, through bolted or fully flanged body types. • Long legged spring with curved heels for increased component life. • 'Heelfirst' opening action eliminates wear on seat and plates. • Non-slam action due to operation on flow cessation. • Suitable for use in a variety of orientations. • Compatible with ANSI, BS, PN and JIS Standards. • Seat material options to match application conditions. • Wide choice of body and plate materials. • Very low cost of maintenance. • Minimum weight and compact design for lighter pipeworksystem. • Suitable for installation in vertical pipelines. • Simplicity of installation and removal

Technical Data
Design standard API 594 (except for face to face dimensions of ANSI 125 cast iron valves, from 2" to 12", which conform to the industry standard). Sizes 2" - 72" (DN50-DN1800) Ratings ANSI Class 125 ANSI Class 150 to 2500 API 3,000 to 10,000 psi Rated Working Pressure
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Testing
FloCheck valves are tested, as standard, in accordance with the following hydrostatic test requirements ... Metal seated valves API 598 Resilient seated valves API 6D (bubble tight)

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HDLDS-0001-EN-0001

Twin Plate Check Valves
parts identification

Pin retainers

Pin

Lug bearing

Body Pinretainers Spring

Plate Body bearing

Standard materials of construction
Flocheck Material Code I D B C L L1 H 3 3F 5 4 N1 N6 6 V M Description Cast Iron Ductile Iron Nickel Aluminium Bronze Carbon Steel Low Temp Carbon Steel Low Temp Carbon Steel Low Temp Carbon Steel 316 Stainless Steel 316L Stainless Steel 304 Stainless Steel 410 Stainless Steel 22% Chrome Duplex Super Duplex Stellite 6Alloy 20 Monel ASTM Grade A126 A216 A352 A352 A352 A351 A351 A351 A217 A890 A351 A744 CI. B BS Grade BS BS BS BS EN 1561 Gr. 250 2789 SNG27/12 1400 AB2 UNS Material F12102 J03002 J03003 J31550 J02505 J92900 1.4401 J92710 1.4404 1.4301 J91150 1.4006 S31803 J92205 1.4462 S32760 J93380 -

WCB LCB LC3 LCC Gr. CF8M Gr. CF8C Gr. CF8 Gr. CA15 4A

Gr. CN7M Gr. M35

3076 NA1

Material selection
SealMaterial Buna N Viton B Neoprene Metal/Metal Spring Material 316 Stainless Steel Inconel 600 Inconel X-750 Monel K500 Temperature Range °F - 70 to 250 - 4 to 392 - 40 to 250 - 450 to 1100 - 57 - 20 - 40 - 267 °C to to to to 121 200 121 1100 Typical Application Water, Air, Dry nitrogen, Gas processing Hot - Acids, Gases and Hydrocarbons Ammonia, Ammonia by-products Caustic, Liquid nitrogen

Max.Temperature °F 250 600 1000 400 °C 121 316 538 204

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Twin Plate Check Valves

Notes As the FloCheck is usually either open or closed, calculations are based on pressure loss across the check valve when fully open at different flow rates. Pressure Loss for Liquids PD = ( Q2 x Gf ) ÷ Cv2 Pressure Loss for Gases PD = ((Gg x T ) ÷ P ) x (( Q 2 ÷ ( 1360 x Cv )2 ) Key PD = Pressure Drop (psi) Q = Flow Rate Liquid: US gallons per minute Gas : Standard cu. ft. per hour = Specific Gravity of fluid e.g. water = 1 for 60°F at 1 ATM = Specific Gravity of gas e.g. gas = 1 for 60°F at 1 ATM = Valve Flow Coefficient ( see table opposite ) = Absolute Temperature (°F + 460 ) = Absolute vapour pressure for liquid at inlettemperature in PSIA ( psi + 14.7 ).

Percent of flow area - as percentage of pipe ID
Pressure Class Size 2” 3” 4” 6” 8” 10” 150 36.7 39.1 41.4 54.0 56.7 56.0 300 36.7 39.1 41.4 54.0 56.7 56.0 600 44.0 43.8 45.8 58.5 57.8 67.9 900 54.4 46.6 47.7 52.9 58.6 70.5 1500 2500 54.4 46.6 47.7 52.9 58.6 52.6 36.1 32.8 29.5 33.4 32.7 30.9 Size 12” 14” 16” 18” 20” 24” 150 61.8 66.7 64.3 74.5 70.8 66.0...