API Cast Steel Check Valve 250 mm in Accordance with ISO17292、API 608、BS 5351、GB/T 12237

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Product Description:

The features of check valve

Bolted Bonnet;Swing and lift disc;Metallic seating surfaces.

Body and Bonnet Connection

The body and bonnet of Class150~Class900 check valves are usually with studs and nuts.And the body and bonnet of Class1500~Class2500 check valves are usually of pressurized seal design.                                                                                                         

Body-To-Bonnet Joint

Stainless steel + flesible graphite wounded gasket is used for Class 150 and Class 300 check valve;Stainless steel + flexible graphite wounded gasket is used for Class 600 check valve,and joint gasket is also optional for Class 600 check valve;Ring joint gasket is used for Class900 check valve;Pressurized seal design is used for Class 1500~Class 2500 check valves.


For carbon steel check valve,the seat is usually forged steel.The sealing surface of the seat is spray welded with hard alloy specified by the customer.Renewable threaded seat is used for NPS<10 check valves ,and welded on seat can be also optional if being requested by the customer.Welded on seat is used for NPS>12 crbon steel gate valves .Forstainless steel check valve,integral seat is usually adopted ,or to weld hard alloy directly integrally.Threaded or welded on seat is also optional for stainless steel check valve if being requested by the customer.

Standard   Criteria

 ASME/ANSI/API customize   

Pressure   Rating

 150   Class  300 Class  600 Class  900   Class  1500 Class  2500 Class customize 

Valve   Size

 50   mm  65 mm  80 mm  100 mm  125   mm  150 mm  200 mm  250 mm 300   mm  350 mm  400 mm  450 mm  500   mm  600 mm  650 mm  700 mm 750 mm

 2   inch  2.5 inch  3 inch  4 inch  5   inch  6 inch  8 inch  10 inch  12   inch 14 inch  16 inch  18 inch  20   inch  24 inch  26 inch  28 inch  30   inch customize 


 Automatic customize 


 Butt Welding  Flange   RF  Flange RTJ customize 

1-Body Material

 A216   WCB  A351-CF8  A351-CF8M customize 

2-Seat ring

 A105+13Cr  A351-CF8M  A351-CF8  A105+Tool   Steel customize 


 13Cr+A216   WCB  A351-CF8  A351-CF8M  Tool Steel+A216   WCB customize 


 A351-CF8M  A216   WCB  A351-CF8 customize 


 A194-8  A194   2H  A194 8M customize 

6-Arm pin

 A182-F316  A182-F6a  A182-F304 customize   


 A351-CF8M  A216   WCB  A351-CF8 customize 

8-Bonnet nut

 A194 2H  A194   8M  A194-8 customize 

9-Bonnet bolt

 A193-B8  A193-B8M  A193-B7 customize   


 A193-B8  A193-B7  A193-B8M customize   


 graphite+304  316+graphite customize   


 A351-CF8  A216   WCB  A351-CF8M customize 

13-Eye bolt

 A181 customize 

Design Standard

 API 6D  BS   1868 customize 

Connection Standard

 API 605  ASME B   16.25-2007  ASME B 16.47A  ASME B 16.47B  ASME   B 16.5  MSS SP-44 customize 

Test Standard

 API 598  API   6D customize 

Face to Face

 ASME B 16.10 customize 

Pressure-temperature ratings

 ASME B   16.34-2004 customize 

Wall thickness dimension

 API 600  BS   1868 customize 

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Q:i can't pump my presta valve...?
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Q:bmw 740il pcv valve...................?
In front of the engine slightly to the left and lower area of the throttle valve. It is a round black plastic canister supported by a teardrop shaped rubber with a cable connector at the top and 2 hose connections at the opposite end of the cable connector which are perpendicular to each other. BMW calls it the tank vent valve.
Q:heater valve on a 1996 vw passat?
There is no Heater Control Valve. Coolant circulates through the heater core continuously. Air flow is directed through the heater core/ac evaporator in the air distribution box under the dash as required by user input. If you have no heat, there are a couple of things that could be wrong. A bad water pump, plugged up heater core, bad blend door/cable, bad Climatronic control head, or a bad actuator/motor. So, what's your question? What is the car doing/not doing that you think it should/should not do?
Q:1995 Chevy V6 Blazer EGR valve?
I own a shop, and a 4.3 V-6 blazer (94) that did the very same thing as yours. I started running nothing but 93 octane Amoco, or BP gasoline, and the problem has went away. The funny thing is; the gas cost more, but since I run this gas I get much more gas mileage now, so it more than makes up for the difference. I also run STP fuel injector cleaner in it every 3rd tank of gas, and put it in at 3/4 of a tank. Don't use the STP in the white bottle as it is crap! Use the one in the black bottle. You will tell a difference right away. It is important to change the PVC valve every time you change the oil filter, as this will cause it too. My Blazer cranks out about 30 miles per. gallon, and about 20 around town, so it's easy to see the difference. Advance Auto Parts carries a new gasket for the EGR valve that has a screen in it, and that too will help the problem. It might even fix the problem, I'm not sure but it is supposed to stop the problem. Go to their website and look it up. It will be in the listing with the EGR valve. I think it's made by Tomco, but not positive. Glad to help out, good Luck!!!
Q:Loose Valves... What Do They Cause By Being Loose?
Yes .....your throttle responce is the worst. Because the valve is not opening wide enough for the air to flow properly. Adjusting valves is real simple. it only takes a feeler gauge and a screwdriver / wrench. You just get the gauge so it drags/scratches on it's way out from in-between the rocker arm and valve tip. There should be a little resistance when pulling it out. But it should not be stuck .......or the adjuster screw is too tight. It only takes small 1/8 turns to get the movable grab you want in the feeler gauge. You can keep riding it that way..........but it will only get worse with time. Because the rocker arm starts to whack the top of the valve instead of tap it down. With it loose, the valve is not getting the full opening stroke it should. Eventually you will have to get it fixed from hard staring and lagging performance
Q:does the pcv valve help my transmission shift?
The PCV valve is part of the engines emission control system. It controls the evacuation of the crankcase by applying engine vacuum to the crankcase and introducing the vapors drawn off into the engine. If the PCV valve and especially it's hose cracks or breaks, the engine will have a bad vacuum leak. The engine will loose a great deal of power. Many transmissions have a vacuum modulator that adjusts the shift points based upon engine vacuum levels. Normally low vacuum is associated with WOT (Wide Open Throttle) and so the tranny will delay upshifts when WOT is detected. Astrobuf
Q:Mazda MX-3 EGR Valve?
Most of the time its not the EGR Valve, this something else. Do you no what code or codes were found ? I've seen the O-ring missing on the PVC valve alot and this trips a EGR code, Check the PVC Valve for the O-Rings or when the engines ruining open the oil cap and check to see if theres a large vacuum there. If so the O-ring is missing.
Q:Reed valves?
reed valves are in a 2 stroke cylinder head they are exactly like they sound like in a clarinet.. when the piston rises they are closed due to the position the port is in the cylinder . when the piston is down stroking it creates a vacuum hence the reed valve opens and the piston starts to rise closes the reed valve.. 4 cycle engines have mechanicaly activated valves from a timing chain and a camshaft which controls when the valve opens so the answer is NO NO NO
Q:what is an air control valve, used for air line tubing?
If theres a power outage the water won't go through the tube and into the air pump.
Q:would EGR Valve Temperature Sensor make a car run lean?
Hydrocarbons are caused by an incomplete burn in the cylinder on the power stroke. An EGR can possibly be the problem, but so could a bunch of other things. I suggest taking it to a good shop and let them figure out what is wrong. If you guess, you could literally spend hundreds of dollars on things for your engine that won't make any difference at all. Look for ASE certified shop is the best.

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