Ductile Iron Double Air Valves

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Product Description:


Double flanged Double Eccentric Butterfly Valve
DN100 ~ DN2000

Technical Specifications

- Design and manufacture: EN593, EN1074-1 and 2

- Face to face dimension: EN558-1 Series 14 (DIN3202 F4)

                                              EN558-1 Series 13 (BS5163)

- Flange dimensions and drillling: EN1092-2 PN10/16/25

- Size range: DN100 - DN2000

- Max. working pressure: 1.0/1.6/2.5 MPa

- Inspection test: EN12266

- Working temperature: -15°C to +80°C

- Suitable medium: water

Main Fetures

- Double eccentric disc reduces seal wear and torque

- Body seat ring is welded directly on the body

- Bi-directional flow and low head loss

- Disc sealing ring to be replaceable on pipeline without dismantling the valve

- Body and disc inside and outside epoxy powder coated (min. 250 microns)

- Opening and closing indicators are provided

- Coupling flange for electric actuator in compliance with ISO5211

- Gearbox and electric actuator operation available

Main Parts and Materials

Body and disc: ductile iron EN GJS500-7/400-15

Shafts: stainless steel AISI 420

Body seat ring: stainless steel AISI 304

Disc sealing ring: EPDM or NBR

Retaining ring: stainless steel or ductile iron

Shaft bearing: Du bushes (self lubricating bushes)

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Q:i'm being charged $300 to replace a 75gallon water heater valve, is that too much?
on the high side 60 bux other than that you can get half a new heater for 300$ crazyness/
Q:How to adjust valves?
You know what they say. if you cant hear the valves tapping, their doing damage! but it can be too loud. Make sure that your cylinder is at top dead center for the valve your adjusting. Then You need to know what feeler gauge is right but you probably already know. Make sure when you adjust them that they make the feeler gage drag slightly when you pull it out. If you have a twin you need to make sure that each cylinder is top dead center when you adjust the valve for it.
Q:Valve Replacement Surgery?! ?
Valve replacements actually have very low morality rates like 1-2%. There are always risk's with surgery though, such as blood clots or irregular heart rate. The recovery in the hospital is generally 5-7 days, and then it can take anywhere from 8 weeks to a year to feel recovered.
Q:new head gasket. insane valve tapping?
Ok The push rods are fine. There is no order they go in. The valves are taping due to poor lubrication, also did you do a valve job before u put the gaskets on? Also Use STP oil treatment after replacing the gaskets its a thicker oil that lubes better. The water pump wont be ur only issue. it sound like there is some restriction in the cooling system, Firs check the upper radiator hose it should be hot not cold, check the reservoir its shouldn't be over flowing and make sure the V-belt is in good condition make sure there are no cracks in the belt. make sure The thermostat is installed correctly and Check the radiator it self if the radiator is back-up i recommend a new one if u cant affored it remove radiator and have i boiled out clean. Oh just for safe measure get a block test done just so u will know there are no cracks in the block
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:valve clearance?
289 bored to 351? Maybe possible to STROKE it to 351, but I've never heard of it. I have heard of people running that much lift with stock springs, but I wouldn't recommend it. It's easier to change the springs with the heads off, so you might as well pull them and check clearances with clay.
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:what is a flush valve? is it another name for a drop valve?
A flush valve (if you are talking about a toilet) is the flapper at the bottom of the tank. I suppose it could also be called a drop valve. At any rate, a flush valve is designed to rest in place preventing water from passing. When the flush valve is raised, trapped air in the bell of the flapper will cause it to float as high as possible, allowing water to pass without restriction. When the water level is low enough the flapper will float back down and seal the opening, thus allowing the tank to refill and be ready for another flush. Good luck. :)
Q:water inlet pressure relief valve?
It sounds like a pressure reducing valve. As you tighten that bolt it increases the pressure and made it leak more.It's probably not any good. I think if you go to a home center you'll find one . probably a Watts brand. They seem to be more prolific. Not hard to change.
Q:chevy 350 exhaust valve seat pittings?
Yes the faces and seats need to be recut, just fix it right the first time.

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