Dual plate check valve

STANDARD SPECIFICATION

Size Range

50mm to 2000mm

Mfg/ Design Std.

API 594/API 6D

Type To Valve

Wafer & Double Flanged

Pressure Rating

PN 1.0 / PN 1.6 / Class - 125

Flanged End

IS: 1538 (Tab – 4 &6), On Request – BS/ ANSI/ AWWA/DIN/BSEN

Face to face

API 594 / API 6D / MSS SP 125 Mfr’s Std.

Body & Other C.I Parts

C.I to IS: 210 Gr. FG-200/260 or BS 1452 or ASTM A126

Optional Disc Matl.

C.S. / S.S. / Brass

Seat ring

L. T. B. to IS:318/ S.S. AISI-304/316 & EPDM or Viton or BUNA –N rubber

Hinge/Stop Pin

S.S. to AISI -410/431/304 or 316

Spring

Spring Steel/S.S. AISI -304 or 316

Seal Design

Resilient Seal / Metal to Metal Seal

Inspection & Testing

API 598

Installation Instruction

• When installed in horizontal pipe line, the door hinge shaft must be in the vertical position for proper operation.

Special Features

• More compact & structurally sound design
• Dual plate valve is, all purpose Non return Valve i.e. Swing Check or Lift Check
• Discs open 85’ to ensure positive closing
• Design facilitate to no water hammer & Non Slam simultaneously
• Function – When the flow decreases, the plate closes by torsion spring action without requiring requiring reverse flow.
• Available in  Cast Steel & S.G. Iron