API Cast Steel Check Valve 900 Class 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:Cost to replace/fix valves?
Most mechanics will put on a rebuilt head -- if you were to buy it, they cost approx $350 for the head assembly.
Q:1990 Geo Storm EGR valve?
First, okorder.com/... I see that Autozone doesn't have that part, but it does mention there are 3 different possible part #'s, depending if it's a 2+2 or GSI, and/or Transmission type, so keep that in mind if you need to order a new one. Click EGR Valve in buy it here box for more info.
Q:Do veins in the head and neck contain valves?
No. They wouldn't work... Valves only allow blood to flow one way. If the valve allowed flow out if the head then it would always be open (unless you went upside down), so they wouldn't be needed. If they stopped blood flowing out if the head...well...you'd have a big purple bloaty head.
Q:what is a foot valve used in petrochemical companies?
A foot valve is placed at the bottom of a suction pipe, which could be used to drain a large container of liquid. The foot valve is a one-way valve (check valve) that prevents the liquid from draining back into the container.
Q:i have a 96 mitsubishi galant and when you press the accelerator it rattles in the valve cover?
You might not need new valves or valve guides. Mitsubishis, along with many other vehicles, use hydraulic lifters which give off a ticking sound. They're located between the rocker arm, or in the rocker arm, and the head of the valve. It's very common and will not harm the engine. However, if the sound you're hearing is more of a rattling, like putting some nuts and bolts in a glass jar, you may need to pull the valve cover off and inspect for yourself to make sure that the rocker arms do not have any play to them while they are pushing on the valves. If there is any play in the rocker side to side, you may need to replace those rockers. However, if there is any play up and down you may just need to replace the lifter. To better check if you need new valves or valve guides run through this checklist: Are you burning oil? Have you done a compression test (both wet and dry)? And if so, were the compression numbers within spec? Have you felt a loss in power/idle quality/gas mileage? Is your oil level correct/using the correct oil/non-FRAM oil filter? At your next oil change, instead of using the recommended 5W-30 engine oil, try switching to something a little heavier, such as 10W-30, to cancel out the effect of possible lifter tick. Do not use a FRAM oil filter if you have in the past since they're filters tend to have additives that are unnecessary and may cause the engine harm.
Q:Difference between a pressure tap valve and a gate valve?
they have different functions, the pressure bypass valve is normally used in Heating systems, between the Flow and Return circuits, just in case all the radiators are shut and the water has no were to flow, some of the more sophisticated use a pressure differential between one side of the circuit to the other to operate, Also generally set at quite a low pressure. Pressure release valves are used on closed loop central heating systems or other water systems were unwanted pressure can build up, and usually will vent to some sort of outflow, IE over flow pipe or return to a hot water tank and operate at higher pressure and are more likely to be adjustable
Q:how to intall a new shut off valve?
its called 'an angle-stop' and if you have copper, its sweated on or compression fit. if its compression, get a crescent wrench and take it off at both pipes and take to store and replace same ones, but better quality. don't forget to shut off the water to the house outside! if its sweated on, you need to have someone that knows how to copper weld to do it for you. if its galvanized pipe, unscrew it like 1st and proceed with another like item or switch to copper with a dialectic fitting between both.
Q:What would valve seat faulty will cause my h22a?
If the valve seats leak it will cause oil to run down the valve stem and either it gets sucked into the intake or it get pushed out the exhaust, depends if both valve stems are leaking. It would be black smoke not white. Your car will produce water in the exhaust system when exhaust goes through the cat converter this may come out as a white smoke but it should not be something you can see if your driving. If it is that much you have a head gasket problem.
Q:Replacing Valve Cover Gaskets?
Q:Is my Gas Valve faulty ?
There are a few possibilities. The valve runs on a low voltage line. The low voltage is provided by a transformer. It it possible the transformer is bad. Be sure the power switch to the furnace is on. (should be on the side of the furnace. Easy way to check is (on the thermostat) turn the fan switch from auto to run. The blower fan should come on. Check that the gas valve is in the ON position.(if you have had to light the pilot it may still be in pilot position.) Another possibility is a clogged gas line. If you have an older home rust can accumulate inside the iron gas lines. Where the gas line attaches to the furnace there should be a drip leg. This is a short length of pipe that points down with a cap on it from the TEE that goes into the furnace. This short piece of pipe is to catch any moisture or rust that comes thru the line. First TURN OFF the gas at the shut off in the pipe it's self. This is a quarter turn valve. When the handle is in line with the pipe the gas is on. When it is opposite the pipe (pointing out to the side) the gas is off. After turning the gas off, remove the cap from the bottom of the drip leg to remove any accumulation.USE PIPE DOPE not teflon tape when putting the cap back on.Turn the gas valve back on and check for leaks.

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