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Check Valves

Oswal check valves are heavy duty, bolted cover, renewable seat ring, and body mounted disc swing type. Valves are straight through flow which works automatically. They are opened by the force of velocity pressure and closed by the force of gravity and back pressure. The valves are single direction flow and restrains flow in opposite direction. Distortion, wear and noisy operation of the valve can be avoided by selecting the size of the valve on the basis of flow conditions. Swing Check valves are best suited for moderate velocity operations. Swing Check valves are normally designed for horizontal installations. It can be installed in vertical direction with flow in upward under the disc. There is no tendency for seat to gall because the disc meets flat surface without rubbing upon contact.

The most advanced design features provides the ultimate in dependable, economic flow control. They are available in wide range of sizes and weights. Flow directions are marked as cast on the body for ease of installation.

Swing Check valves are adequate for all service media. Valves can also be supplied with counter weights and dash pot arrangement depending upon the condition and request.

Product Range For Cast And Forged Swing Check Valves

Valve Type Class Rating Size Range Shell Material As Per Specification
Swing Check 150# 2" to 36"
ASTM A216 Gr. WCB
ASTM A217 Gr. WC1
ASTM A217 Gr. WC6
ASTM A217 Gr. WC9
ASTM A217 Gr. C5
ASTM A217 Gr. C12
ASTM A351 Gr. F8
ASTM A351 Gr. F3
ASTM A351 Gr. F8M
ASTM A351 Gr. CF3M
ASTM A351 Gr. CN7M
ASTM A351 Gr. CF8C
ASTM A351 Gr. CD4Mcu
ASTM A351 Gr. CK3MCuN
ASTM A352 Gr. LCA
ASTM A352 Gr. LCB
ASTM A352 Gr. LCC
ASTM A494 Gr. CW6MC
ASTM A494 Gr. CW2M
ASTM A494 Gr. CW2M
ASTM A494 Gr. CY40
ASTM A494 Gr. CU5MCuC
ASTM A995 Gr. 1A
ASTM A995 Gr. 4A
ASTM A995 Gr. 5A
ASTM A995 Gr. 6A
NACE malt. Grade to NACE MR0175/NACE MR

Swing Check 300# 2" to 36"
Swing Check 600# 2" to 32"
Swing Check 800# 1/2" to 2"
Swing Check - Pressure Seal 900# 1/2" to 20"
Swing Check - Pressure Seal 1500# 1/2" to 20"

Note:
  • Valves can be supplied with actuator,pad lock and other accessories like limit switch,position indicator,solenoid valve as per requirement
  • Stem extention,underground service features are available

Standards

Design Standard BS 1868
Testing Standard BS EN 12266 – 1
Face To Face ASME B 16.10
End Connection Flanged End - ASME B 16.5
Butt Weld End – ASME B 16.25
Pressure – Temperature Chart ASME B 16.34

Material

STRUCTURE End Connection Flanged End Raised Face, Butt Weld End, RTJ,. ETC
MATERIAL Shell WCB, WC1, WC6, WC9, LCB, LCC, LC3, C5, C12, CF8, CF8M, CF3, CF3M, CF8C, CN7M, CD4MCu, Hastelloy, Inconel, Duplex Stainless Steel
Trim 13% Cr Steel, 304 , 304L, 316, 316L, 321, 347, F51, Monel