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 of valves and in lower rating also on request.

Standards:

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 216 GR. WCB, ASTM A 217 GR. WC1/WC6/WC9/WC11, ASTM A 352 GR. LCB/LC3, ASTM A 351 GR. CF 8 /CF 8M/CF 3/CF 3M/CN 7M, IS 210 GR. FG 200/220/250/260

Disc:- AISI 410 (13% Cr.) /AISI 304/316/304L/316L/Alloy 20

Seat:-AISI 410 (13% Cr.) /AISI 304/316/304L/316L/Alloy 20

Hinge Pin:-AISI 410 (13% Cr.) /AISI 304/316/304L/316L/Alloy 20

Gasket:-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

Dual Plate, Wafer Check Valve has One Piece cast heavy stronger Body configuration provides reduced weight and size compare to a swing check valve or lift check valve. This results savings in Initial cost, space and pipe support element installation.

The Dual Plate, Wafer Check Valve employs two-spring-loaded plates hinged on a central hinge pin. When the flow decreases, the plates close by the action of torsion spring before flow reversal takes place. All features put together make the Dual Plate Check Valve as the most efficient & versatile design. It is also referred to as SILENT CHECK VALVE

It is much easier to install between standard gaskets and line flanges, and therefore is more cost effective to install and to maintain.

Its design complies with API 594 and API 6D, testing with API 598.

Features:

• Light Weight, Versatile Design, and 80 to 90% lighter then conventional full body check valve.

• Reduces pipe supports, simplifies piping, easier, less costly installation.

• Spring Loaded double door design has low cracking pressure.

• Disc open 80% to ensure positive closing

• Materials and trims available for all services within temperature range.

• Rubber To Metal or Metal To Metal Seat available

• Neoprene, Buna-N, EPDM, Viton®, Silicon etc.

Standard:

Design Standard:-API 6D / API 594

Testing Standard:-API 598

Pressure Class:-150# to 300#

End Connection :-Wafer Type, Flangeless, Suitable To Mount Between, ANSI B 16.5/BS 10 Table/DIN/JIS/IS Flange

Material Specification:

Body:-IS 210 GR. FG 200/220, ASTM A 216 GR. WCB, ASTM A 217 GR.WC1/WC6/WC9/WC 11

ASTM A 352 GR. LCB /LC3, ASTM A 351 GR. CF8 /CF8M / CF3/CF3M

Disc:-ASTM A 216 GR. WCB,ASTM A 217 GR. WC1/WC6/WC9/WC 11,ASTM A 352 GR. LCB / LC 3 ASTM A 351 GR.CF8 /CF8M/CF3/CF3M

Hinge/Stop Pin:-AISI 410 / 304 / 316 / 304L / 316L

Seat (Moulded):-Neoprene / Nitrile / Buna-N/ NBR / EPDM /Silicon / Viton

Spring:-S.S. 304 / 316 / 304L / 316 L

Lifting Hook:- C.S. / S.S 304 / 316

Wafer Type Check Valve has short face-to-face dimensions and low weight allows a simple space saving installation between the companion flanges. The valves are suitable to mounting between weld neck or slip on type companion flanges of different standards.

They are specially developed for applications where a low-pressure loss is essential. Opening and closing of the valve will take place at an extremely low-pressure difference over the valve disc. The eccentric disc shaft combination with the disc seat guarantees a positive shut off returning media. Wafer check valves are becoming the preferred type of check valve for most applications, due to their compact design and relatively low cost.

Features:

• Body Type: Single Plate, Short Type

• Suitable For Horizontal and Vertical Mounting

• Shorter overall length, mounting requires minimum space.

• Low Pressure Drop

• Easy to Install

• Less Weight

• Maintenance Free

• End Connection: Wafer Type, Flangeless

• Size Range: 1” To 42”

• Pressure Rating: 150#

• Seat Leakage: Zero Leakage, Tight Shut Off

• Temperature Range: -250 To + 2000 C

• Mounting Between: ANSI B 16.5 / BS 10 /DIN /IS/JIS Flanges

• Design Standard: API 6D

• Testing: API 598

• Face To Face: ANSI B 16.10

Disc Check Valves feature a wafer type, compact and rugged cast steel design and are suitable for any process liquid, air, gas, steam etc. Disc check valves are opened by the pressure of fluid and closed through compression spring as soon as flow stops thus preventing reverse flow.

Advantage of these check valve is they can be mount between pipe flanges in any direction. Body Seat available in Metal-to-Metal and Soft seat also.

FEATURES:

• Compact & Rugged Design

• Less Weight

• Easy To Installation

• Maintenance Free

• Zero Leakage (In Soft Seat)

Standard:

Design Standard:-DIN EN 558-2

Testing Standard:-DIN 3230 / API 598

End Connection:- Wafer Type, Flangeless Suitable To Mount Between ANSI B 16.5/BS 10 Table/DIN/JIS/IS Flange Rating 150# to 300#

Size Range:-15 MM to 100 MM

Material Specification:

Body:-ASTM A 216 GR. WCB, ASTM A 351 GR. CF 8 /CF 8M / CF 3 / CF 3M,

Star Guide:-ASTM A 216 GR. WCB, ASTM A 351 GR. CF 8 /CF 8M / CF 3 /

CF 3M

Seat Metal To Metal – Integral Body: –S.S. 304/316/304L/316L

Soft Seat :– P.T.F.E./Neoprene/EPDM/Nitrile/Buna-N/Silicon/Viton

Disc:-ASTM A 351 GR. CF 8 /CF 8M / CF 3 / CF 3M

Spring:- S.S. 304 / 316 / 304L / 316L

Circlip :-S.S. 304 / 316 / 304L / 316