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Wenzhou Goldtop Valve Co.LTD
Gold top valve located in Oubei Town, Wenzhou, China,where can make all kinds of precision balls,including top entry,metal seat and V type balls.On this base,our products range of floating,trunnion
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Bolted Cover Cast Stainless Steel Swing Check Valve API 6D ANSI B 16.25 CN7M Alloy 20

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Bolted Cover Cast Stainless Steel Swing Check Valve API 6D ANSI B 16.25 CN7M Alloy 20

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Brand Name : GOLD TOP

Certification : API 6D

Place of Origin : 中国

MOQ : 1pcs

Price : Negotiation

Supply Ability : 100+pcs+30days

Delivery Time : 30days

Packaging Details : Plywood Case

Material : Carbon / Stainless / Alloy / Duplex Steel

Size : 2"~24"

End Connection : RF / RTJ / BW

Face To Face : B 16.10

Pressure : 150# ~1500 #

Design : API6D

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Bolted Cover Cast Stainless Steel Swing Check Valve API 6D ANSI B 16.25 CN7M Alloy 20
Swing Check Valves
Swing Check valve which the valve disc attached to the hinge and swing onto the seat or off the seat to prevent the back flow of the fluid and only permitting the fluid to flow in one direction.
  • These valves are fully closed when the flow reaches zero and prevent back flow.
  • Swing check valve available in 2” to 24” of range size.
  • The pressure classes for swing check valves are 150# to API 10 000.
  • The swing check valve functions by allowing flow forces to move the disc from the closed position to the fully open position in a sweeping arc motion against the hinge stop inside of the valve body.
  • Due to the weight and center of gravity location of the disc and swing arm assembly, the valve will return to the closed position when the flow become interrupted or reversed.
  • External counterweights mounted on the hinge pin are sometimes used to increase or decrease the reaction time and speed of the disc returning to the closed position.
  • Swing check valves have no requirement for operators, and so the valve is operated automatically by flow reversal.
  • The flow direction of the fluid is indicated by the arrow on the swing check valve body.
  • A swing check valve is recommended for use in systems consisting of gate valves because of the low pressure drop across the valve.
  • Swing check valve also recommended for systems having low velocity flow and should not be used on systems with pulsating flow when the continuous flapping or pounding would damage the seat.
Swing check valves are ideally suitable for vertical and horizontal application. A range of Check Valves (Non-Return Valves) suitable for oil, gas, water, refining, power and chemical applications where the prevention of flow reversal is mandatory. Our Check Valves are Bolted cover design up to 600# and above pressure seal design.
Stellited trims are provided for all above 600# as a manufacturing standard valves and in lower rating also on request. Swing Check valves are available under any Third party inspection including IBR (Indian Boiler Regulation). Swing Check valves can be supplied with Titling disc design, Counter weight or Dash pot arrangement.

Design Standard
BS 1868/API 6D
Inspection & Testing Standard
BS 6755/API 6D
Face To Face
As Per ANSI B 16.10
End Connection
Flanged End To ANSI B 16.5/BS 10 Table
Buttweld End To ANSI B 16.25
Size Range
1" To 24"
Pressure Rating
150# To 1500#
Material Specification:
Body / Cover / Hinge
ASTM A 217 GR. WC1/WC6/WC9/WC11
ASTM A 351 GR. CF 8 /CF 8M/CF 3/CF 3M/CN 7M
IS 210 GR. FG 200/220/250/260
AISI 410 (13% Cr.) /AISI 304/316/304L/316L/Alloy 20
AISI 410 (13% Cr.) /AISI 304/316/304L/316L/Alloy 20
Hinge Pin
AISI 410 (13% Cr.) /AISI 304/316/304L/316L/Alloy 20
CAF/Grafoil/S.S. Spiral Wound With CAF/Grafoil/P.T.F.E.
Disc Lock Nut
A 194 GR. 2H/S.S. 304/316
Stud & Nut
ASTM A 193 GR. B7/ A 194 GR. 2H/S.S. 304/316

Product Tags:

lift check valve


high pressure check valve

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