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.
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.
150 Class 300 Class 600 Class 900 Class 1500 Class 2500 Class customize
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
Butt Welding Flange RF Flange RTJ customize
A216 WCB A351-CF8 A351-CF8M customize
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
A182-F316 A182-F6a A182-F304 customize
A351-CF8M A216 WCB A351-CF8 customize
A194 2H A194 8M A194-8 customize
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
API 6D BS 1868 customize
API 605 ASME B 16.25-2007 ASME B 16.47A ASME B 16.47B ASME B 16.5 MSS SP-44 customize
API 598 API 6D customize
Face to Face
ASME B 16.10 customize
ASME B 16.34-2004 customize
Wall thickness dimension
API 600 BS 1868 customize
- Q:Mountain bike presta/shrader valve?
- Your tube probably has a Schrader valve, like a automobile tire. You can get these in the auto department of most stores and of course at auto parts stores. You might pickup a little dirt. Look at the valve to see if it's dirty. If so, press the center of the valve with a small object (small screwdriver maybe). This will blast the dirt out with air from the tube. Of course, you will then need to pump up the tire a little. If the valve gets dirty and you simply pump air in when the tire is soft or flat, you may force dirt into the valve which could cause the valve to leak. Schrader valves are replaceable. You can get these (and the tool to remove them) at an auto parts store.
- Q:how to replace an egr valve on a 2002 mercury sable?
- Un plug the vacuum hose on top of the valve, loosen and remove the big tube nut on the bottom of the valve, I have found if you hit it sharply with a hammer 3 or 4 times before you try to loosen it won't break the valve off, once the tube nut is undone remove the 2 bolts holding the EGR valve to the intake manifold. Remove and discard the gasket and install the new valve in the reverse order. If the tube nut still won't come loose try heating it with a torch, if it's really rusted on you might have to replace the EGR tub along with the valve.
- Q:Do we need to position a Gate valve as per the flow direction?
- the gate valve is a very important one in flow measurement and also used to help the measure of flow. for example if you know the pneumatic comparator operation, you can easily under stand the gate valve. the gate valve is mainly used for to adjust the float in the tube to zero position or the clearance value.
- Q:What is valve guide clearance?
- You got a couple of things mixed up Valve guide to valve spring retainer clearance is what limits lift. Thats the space from the top of valve guide to the bottom of spring retainer. Or from a lift stand mount, how much the spring/retainter can move down before bottom of retainer hits top of the guide The valve guide clearance has nothing to do with lift. Its the clearance between the inside of guide and outside of valve stem. Pretty much the amount the valve can move left to right, fowards to backwards inside the guide
- Q:Two PVC valves?
- No No No, The PVC valve removes a measured amount of crankcase blow by, oil vapor and water to be re-burned in the combustion chambers for emissions standards. The breather in the valve cover is needed to let atmospheric pressure in the crankcase to replace the air the PVC valve and hose has already been removed. I think you've been reading up on dry sump systems. Race engines make more power with a crankcase under vacuum while running.
- 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:Calculation of Shutdown Valve Instrument Air Supply?
- Shut down valves I've worked with haven't had an 'Air Flow' for their operation. For the smaller valves, they consist of diaphragm operated valves either held open or closed by pneumatic pressure. The air supply at 25psi to give a diaphragm holding pressure of 15 psi, is via a solenoid valve which dumps the air pressure to either open or close the valve depending upon its function. (That of isolating a system or relieving pressure). The solenoid is actuated by a signal from the shut-down system, and the valve is a 3-way unit which isolates the supply air and vents the pressure off the diaphragm. Other SDV's in my experience, are operated in a similar way but are much larger and are operated by a pneumatic air cylinder and piston with air supplied at 100 psi. Others encountered are ... MOV's...Motor Operated Valves that can be automatically operated from the shutdown system, or Operated Remotely from a safe distance (ROV's).
- Q:valve seals??????????
- spring compressor is only special tool you need, can borrow one at autozone for free (you pay a deposit but get it back) but one question, does it smoke when you start it up then quit after a while? that is valve seals. If it smokes after warm up and when you accellerate its probably the wiper rings in the engine.
- Q:mitral valve regurgitation and surgery?
- The valve should be replaced under two conditions: it is causing symptoms that interfere with your lifestyle, or it creates a risk of more serious medical complications. It looks like it isn't affecting your lifestyle. It would be a good idea to ask your doc about the possible complications that might arise from your particular situation and also find out the likelihood that those complication might arise.
- Q:What is anti-surge valves testing?
- I would think your spreadsheet is charting every move that the anti-surge valve makes - for example if it opens slightly, it takes a reading, if it closes, then another reading etc. Like the other guy says, it's there to basically protect the machine from surging, and no-flow. You should be able to decipher specific actions from those readings - Recycle Trip or Safety On for example. Recycle Trip is when the software sees the machine approaching the surge line and opens 10% (for example 10%), so you should be able to analyse whether you've had any of these events. As far as I know that's the only reason you would study that data - to compare the action of the anti-surge valve, with the process conditions at the time.
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