Check Valves Manufacturer

Z-Lok Check Valves are designed to allow fluid to flow in one direction while preventing reverse flow in piping systems. The valves are made to ensure reliable and efficient operation, providing reliable sealing, low maintenance and great durability. They can be used in industrial, hydraulic, water and process piping systems where backflow is required to be prevented.

Check Valves

Specification of Hydraulic Check Valves

INSTRUMENTATION
VALVES SIZE		1/8″ TO 2″ / 6 MM TO 50 MM
CONNECTIONTHREADED, TUBE END, SOCKET WELD END, FLANGE END
THREADSNPT, BSPP, BSPT, METRIC, JIC, UNF
FLOW PATTERNSTRAIGHT
INSTRUMENTATION
VALVES BODY SHAPE		HEXAGON
PRESSURE RATING1500 PSI, 3000 PSI, 6000 PSI, 10000 PSI, 15,000 PSI, 20000 PSI
CRACKING PRESSURE0.5 BAR 
INSTRUMENTATION
VALVES ORIFICE SIZE		2 MM TO 40 MM
TYPEPOPPET TYPE, SPRING TYPE
MEDIA HYDRAULIC OIL, AIR, WATER, GAS, STEAM, HOT WATER , COLD WATER , SEA WATER , CHEMICAL
MEDIA TEMPERATURE(-50* C TO 350*C ) RANGE AS PER PRESSURE
BODY TYPEBAR STOCK, FORGED
INSTRUMENTATION
VALVES PACKING DETAILS		BOX PACKING, WOODEN PALLET
INSTRUMENTATION
VALVES MATERIAL		SS 304, SS 316, SS 316 TI, BRASS, COPPER, CS, DUPLEX, SUPER DUPLEX, INCONEL, MONEL, HASTELLOY, SMO 254, ALLOY 20, TITANIUM, 904L & ALL OTHER ALLOYS

Types of Check Valve 

HYDRAULIC CHECK VALVE
INLINE CHECK VALVE
NRV
NON RETURN VALVE
POPPET CHECK VALVE
SPRING CHECK VALVE
CHECK VALVE
SWAGELOK CHECK VALVE
INSTRUMENTATION CHECK VALVE

Nrv Valve Materials of Construction

PartInstrumentation Valves Standard MaterialOptional Material
1. BodyCI / MSCS, SS
2. DiscSGI / MSSS
3. ‘O’ ringNitrileEPDM, Neoprene, Viton

Pressure Ranges Available in Spring Check Valve

3000 PSI CHECK VALVE
6000 PSI CHECK VALVE
10000 PSI CHECK VALVE
15000 PSI CHECK VALVE
20000 PSI CHECK VALVE

Threaded Check Valve Dimension

Pipe
Size		Flow Coefficient
(Cv)		Max.0 PressureMin. Opening
Pressure, psi		Temperature
Range, °F		End—End
Lg.0
NPT Female × NPT Female
1/41.013,000 psi @ 70° F135° – 300°2 5/8″
3/83.093,000 psi @ 70° F135° – 300°2 5/8″
1/24.033,000 psi @ 70° F135° – 300°2 5/8″
3/493,000 psi @ 70° F135° – 300°3 5/16″
111.093,000 psi @ 70° F135° – 300°3 11/16″
NPT Male × NPT Male
1/41.013,000 psi @ 70° F135° – 300°3 13/16″
3/83.093,000 psi @ 70° F135° – 300°3 13/16″
1/24.033,000 psi @ 70° F135° – 300°3 13/16″
3/493,000 psi @ 70° F135° – 300°3 13/16″

Different types of Hydraulic Check Valve

  • shuttle valves
  • Poppet
  • Ball type
  • pilot operated
  • Wafer
  • Swing
  • Stop
  • Lift
  • Diaphragm check valves

Socket-Connect Check Valves Dimensions

Pipe
Size		Flow Coefficient
(Cv)		Pressure
Class		Max. PressureMax. Steam
Pressure		Min. Opening
Pressure, psi		Temperature
Range, °F		End—End
Lg.0
316 Stainless Steel Body
Socket Connect × Socket Connect
1/44.02200200 psi @ 70° F150 psi @ 350° F0.05-20° – 400°2 9/16″
3/85.05200200 psi @ 70° F150 psi @ 350° F0.05-20° – 400°2 9/16″
1/27200200 psi @ 70° F150 psi @ 350° F0.05-20° – 400°2 9/16″
3/416200200 psi @ 70° F150 psi @ 350° F0.05-20° – 400°2 15/16″
130200200 psi @ 70° F150 psi @ 350° F0.05-20° – 400°3 9/16″
1 1/449200200 psi @ 70° F150 psi @ 350° F0.05-20° – 400°4 1/8″
1 1/272200200 psi @ 70° F150 psi @ 350° F0.05-20° – 400°4 11/16″
2130200200 psi @ 70° F150 psi @ 350° F0.05-20° – 400°5 7/16″
2 1/2280200200 psi @ 70° F150 psi @ 350° F0.05-20° – 400°6 1/8″
3390200200 psi @ 70° F150 psi @ 350° F0.05-20° – 400°7 5/16″