Swing Check Valves :-

PURPOSE:-

JD 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.

DESIGN & OPERATING PRINCIPLE :-

DESIGN JD Check Valves are Bolted cover design up to 600# and above pressure seal design. It is designed for long service life and maintenance free operation.  It has a full-flow area body and is equipped with a disc arm with dual precision pins for optimum disc connection and protection against damage due to vibration.

OPERATING PRINCIPLE-A swing check valve consists of a flap or disc of the same diameter as the pipe bore, which hangs down in the flow path. With flow in the forwards direction, the pressure of the fluid forces the disc to hinge upwards, allowing flow through the valve. Reverse flow will cause the disc to shut against the seat and stop the fluid going back down the pipe. In the absence of flow, the weight of the flap is responsible for the closure of the valve; however, in some cases, closure may be assisted by the use of a weighted lever.

 

Swing Type Check Valve [Non Return Valve]
Bolted Cover, Suitable for Horizontal & Vertical Line
Design Standard: BS 1868
Size Range – 1″ to 12″
Pressure Rating – 125# / 150# / 300#
End Connection : Flanged End

Lift Type Check Valve [Non Return Valve]
Bolted Cover, Suitable for Horizontal Line Only
Design Standard: BS 1868 / DIN
Size Range – 1″ to 12″
Pressure Rating: PN 6 / PN 10 / PN 16 / PN 25 / PN 40
End Connection : Flanged End

Lift Type Check Valve [Non Return Valve] – ASA Body Design
Bolted Cover, Suitable for Horizontal Line Only
Design Standard: BS 1868 / DIN
Size Range – 1″ to 12″
Pressure Rating – 125# / 150# / 300#
End Connection : Flanged End

Forged Steel Lift Check Valve (Non Return Valve)
Bolted Cover Type
Design Standard: BS 5352
Pressure Rating: 800# / 1500#
End Connection : Screwed / Socket Weld / Butt Weld End

Salient Features :

  • Body & Cover made from high quality casting with liberal sections. The castings are precision machined for high performance.
  • Body Seat Ring & Disc machined to close Tolerances providing smooth action and accurate seating.
  • Seat Ring Screwed in to the body are replaceable type. Seal welded type Seat Ring & Integral Seat cab also be offered on special request.
  • Stellited Seat Ring & Disc also be offered on special request.
  • In built wear life for long duration in service.

SPECIAL OPTION:-

  • Body Type: Single Thin Plate, Short Type
  • Suitable For Horizontal and Vertical Mounting
  • Shorter overall length, mounting requires minimum space.
  • Low Pressure Drop
  • Easy to Install
  • Less Weight
  • Size Range: 1” To 42”
  • Pressure Rating: PN 10 / PN 16
  • Seat Leakage: Zero Leakage, Tight Shut Off
  • Temperature Range: -250 To + 2000 C

Material of Construction:

Cast Iron                     : IS 210 Gr FG 200
Cast Carbon Steel             : ASTM A 216 Gr WCB
Cast Stainless Steel          : ASTM A 351 Gr CF 8/CF 8M
Forged Carbon Steel           : ASTM A 105
Forged Stainless Steel       : ASTM A 182 Gr F304 / F316
Design Type                   : Swing Type Disc / Piston Lift Type Disc
End Connection                : Screwed AS PER BSP/BSPT/NPT
Socketweld                    : AS PER ANSI B 16.11
Flanged                       : AS PER ANSI B 16.5
Pressure Rating               :ASA125#,150#,300#,600#,800#,PN16&PN 40
Engineering Option             : Gear Operated, Electrical Actuated,
Size Range                     : 15mm to 300 mm

Design & Testing International Standard:

Valve Design                        : API 6D
Pressure Testing                  : API 598
Face To Face                        : ANSI B 16.10
Flanged Drilling                  : ANSI B 16.5 / BS 10 Table / DIN / IS 6392
Butt Weld End                     : ANSI B 16.25
Socket Weld End                 :ANSI B 16.11
Screwed End                         :ANSI B 1.20.1(BSP/NPT)