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="" 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:what type valves used mostly in pneumatic system?
- It depends on what sort of system you are operating. Most butterfly valves leak, a few don't. Ball valves are instant operation, and don't normally leak. Needle valves are used for fine control of the flow rate. Gate valves are quick to operate, and don't normally leak. On aircraft pneumatic systems, butterfly valves are common, where a leak is permissable. Where no leak is permissable, slide valves are used, which have rubber seals.
- Q:Painting valve cover?
- Best if you replace the gasket anytime you remove a valve cover. Looks tacky to have a nice shiny painted valve cover with oil leaking onto the engine. Also, it is important to correctly torque the valve cover fasteners. A common mistake is to crank the fasteners down until they are really tight. This over crushes the gasket and can distort the valve cover which can cause leaks. These fasteners when correctly torqued are not as tight as you might think.
- Q:Has anyone had surgery for Mitral Valve Prolapse?
- yes. In Feb of last year. Had a gradually worsening valve and regurg. Had it done at UVA teaching hospital by an excellent surgeon and 2 doctors who were months away from being certified themselves. IN at 6 am, spent most of the day in surgery, stopped my heart, cut open my breastbone, opened my heart, sewed in a ring and trimmed the valve, closed and restarted. Spent a week in hospital; three weeks at home recovering and was released to come back to work at a very low physical demand (and driving a car with no airbags). Couldn't lift or pull anything for a good six months being cautious mostly about the wires holding my breastbone together. Was on blood thinner for about 45 days and on severe pain meds for about 30. HAd a little fluid develop on a lung that eventually cleared, and some anemia issues that also creared up. After 6 month, my cardio told me it went well enough I didn't have to see him again. Year later, only real side effect is some residual fatigue (im 51) and my breastbone gets sore when I'm tired or overstressed. I'm not a smoker and they said this was textbook. No worries man; you'll blow thru it
- Q:Pitted Exhaust valve on generator, can I just replace valve?
- There is no need to replace head if the seat is good. Blue smoke indicates to rich a fuel mixture,white indicates oil consumption.
- Q:Tire valve problem?
- Get rid of the battery powered one try the old mechanical pressure one. 40 psi sounds a bit much unless it's a truck. On the drivers door, there's a sticker which says what the pressure should be for that car w/ that size tire on it. I advise you follow the recommendation. The vehicle was designed w/ that tire in mind to get the best performance fuel economy. If the valave is bad, simply change it out. Go to a professional tire store before you do that. It could be more than you think.
- Q:Blow-off valve requirements?
- A blow off valve releases the excess pressure from your forced induction system when you close the throttle plate. It prevents turbo surge. If you install one on your naturally aspirated vehicle, all it will do is get you laughed at. As for the manual, READ IT! Blow off valves have nothing to do with the transmission, so automatic or manual, makes no difference. Word of advise: Don't work on or modify your car. You'll make it slower at the very least.
- Q:Valves that control flow of substances througha alimentary canal?
- The gastrointestinal tract is thus equipped at critical junctures with a number of muscular valves, or sphincters , which, usually under the direction of the autonomic nervous system, can regulate the movement of food through the digestive tube. Another function of a sphincter is to prevent backflow of partially digested food. The muscles of a sphincter are often described as “pursestring muscles” because the way they draw together the sides of the digestive tube is roughly similar to drawing up the strings of a purse. The first of these pursestring valves occurs at the cardia , the opening where the esophagus meets the stomach, and is called the cardiac sphincter , from its location almost directly in front of the heart. (But there is no physical connection.) Another important muscle ring is the pyloric sphincter , at the opening called the pylorus , located at the other end of the stomach, at the connection between stomach and small intestine. The release of waste from the rectum is controlled, partly voluntarily, by an anal sphincter , located at the anus , which marks the end of the tract.
- Q:Aortic valve replacement surgery?
- Hello Lisa, Aortic valve replacement is a cardiac surgery procedure in which a patient's aortic valve is replaced with a different one. The procedure itself is rather simple. Your chest will be opened, you will be placed on bypass, valves exchanged, and closed again. The risk with respect to the procedure is generally cited as being between 1 and 5 percent. My advice to you is to call ahead, and specifically request to meet the physicians who will be performing surgery; including the Senior Surgeon, and Anaesthesiologist. In some cases, hospitals will provide a general doctor for questions; but it is important to meet all of those who will be operating, both for comfort and questions. When meeting with those who will be operating on you; ask them any questions you might have. They are there for you; to brief you on the procedure, ensure you are ready, and respond to any of your concerns. Dr. James Jeah MD
- Q:leaking valve seal questions for a 1990gmc sierra?
- sounds like valve seals ! no you don,t have to bother the timing ! all you do is remove the plugs, hook up a air compressor and screw 1 end of the hose into the plug hole, take off the valve pan, loosen the rocker and start the compressor up ! once the compressor reaches about 40 to 50 pounds then take out the keeper on the valve stem and replace it with a new seal, if you can get the umbrella type seals, after the seal is replaced put the rocker back on, turn the crank by hand until the rocker is on the low cam and torque the rocker nut ! then you do the same way to the rest of the valve seals !
- Q:Aortic valve question?
- Sclerosis means hardening. Aortic sclerosis, a degenerative aortic valve disease with thickening of aortic valve structures by fibrosis and calcification initially without causing significant obstruction, is the most common cause of AS in elderly patients. Over years, aortic sclerosis progresses to stenosis in as many as 15% of patients. Aortic sclerosis resembles atherosclerosis, with deposition of lipoproteins, active inflammation, and calcification of the valves; risk factors are similar. Aortic stenosis is the narrowing or obstruction of the heart's aortic valve, which prevents it from opening properly and blocks the flow of blood from the left lower chamber of the heart to the aorta. The aorta is the main artery leaving the heart. Aortic insufficiency is a heart valve disease in which the aortic valve weakens or balloons, preventing the valve from closing tightly. This leads to backward flow of blood from the aorta (the largest blood vessel) into the left ventricle (the left lower chamber of the heart). Causes of increased afterload that can cause LVH include aortic stenosis, aortic insufficiency, and hypertension. Primary disease of the muscle of the heart that cause LVH are known as hypertrophic cardiomyopathies, which can lead into heart failure.
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