API Cast Steel Check Valve 125 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:a/c line and pop off valve?
1. the pop off valve is normally located in the compressor so if it over pressures it will relieve some of the pressure. it's not in a line. #2. if it's a 1997 it doesn't have R12. it has R134. the only valve in the line is the port to check pressures and vacuum and recharge it. it could have one of those valves leaking and most can be taken apart and a new schrader valve installed. hope this helps.
Q:How do I fix a leaky brass gate valve?
The little brass nut under the handle is the packing nut. It compresses a packing material like Teflon or a graphite based twine or rope to tighten up around the stem. That is what keeps it from leaking. You can tighten this nut gently to stop leakage. That is what it's for. Just snug it up a little and it should stop leaking. The inline connections are simply hose threads, tightened by hand or snugged up with some wrenches. The small cap on the side of the valve is to drain or vent the branch line. It is simply finger tight. The valve is a 'Stop Waste' valve.
Q:mitral valve prolapse syndrome?
the pain can relate to dysautonomia if it is persisting for long, even it can be a pleuritic pain otherwise, talk to your doctor about it.
Q:hot water heater relief valve?
Most codes state that it must be vented to the outside.Check with your city code enforcer or county office.
Q:how to intall a new shut off valve?
It might just be the rubber gasket inside the valve You'll need: Screw driver to take off screw for handle, Adjustable wrench(Crescent, spanner etc.) a faucet repair kit which has various sizes of seats Turn Off Water!!!!!!!! Open lowest sink or faucet outside or inside let drain off pressure. have a pan or something to catch the drips. with the screw driver unscrew handle and take off for minute, unscrew top (sometimes you can stop a drip by tightening this top to push on the packing depending on where it is leaking) of valve with adjustable wrench and take off there will be a packing material around shaft of valve (black, graphite grey) refasten valve handle and open valve all the way (counter clockwise) It should come out after unthreading. On the bottom of valve stem should be a screw holding the rubber valve seat try to unscrew the screw holding the rubber seat if it breaks you take to hardware store and find a replacement take top with you ask for help. Re-install the opposite way Make sure when re-installing to put the packing around stem three or four turns enough for the top to compress it and able to screw back on the valve if you over tighten you won't be able to turn valve back off until you can.
Q:Any idea on selecting and sizing control valves?
Specialty valves should be sized/recommended by the manufacturer because of the different influences that may be encountered by the valve. Example: Temperature ranges, chemical composition of coolant, type of valve(ball, gate, tempering, other) all will have some effect. I would say take a look at the old one if it exists and if you're not satisfied with its performance, then cross reference it with other companies like Amtrol, Wilkins, etc. This would be the safest most logical method.
Q:Infective endocarditis and valve surgery?
There are risks in any surgery - no matter how major or minor. Overall health condition also plays an important role in his recovery. Being he has an infection which could be life-threatening, treating him and having him go through this procedure gives him more chance of survival. The doctors have weighed the pros and cons of him having this procedure and feel this is the best way to proceed. They will do their best to help and take care of him.
Q:Valve cover gasket leak?
I have see one time that a car had blown valve cover gasket. It leak very well and Touch on Exhaust Madifold. It cause fire. Engine is High milages. Engine make blow by through piston and cylinder. Bypass gas cause Press gaskets or seals to make oil leaks. Other thing is loose vaccum for brakes. It make hard to press brakes. Like air leak. OR Rubber valve cover gasket getting dry up, and start brittles. Its ten years old, So go and replace valve cover. If you know how, That will be great. Do it asap Than Sorry.
Q:What rhymes with valve?
salve, like to put on a wound or something
Q:Will a tire go flat if you just take out the Valve Stem Cap?
A valve stem and valve stem cap are two different things. If you have a good valve stem, you do not need a valve stem cap. People just use then for safety. You remove a valve stem, with would you believe, a valve stem remover, or some caps have a two pointed top that will remove the stem. Now where to buy them, most old fashion gas station, auto parts, or bike shops, even WalMart.

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