wafe type butterfly valve

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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:what does valve actuators do?
The valve is connected to a piston so when it is open the piston is pushed out providing a force or motion at the other end. Usually when the valve is closed a spring will return the piston to the initial position or there may be another valve at the other end to push the piston back. High pressure air or some sort of fluid is used to supplied through the valve.
Q:Why does plumbing code require a gate valve for the main shutoff?
I agree with Ed. I have had far more problems with gate valves than ball valves. They can break in either the on or off position which can really be inconvenient. They usually break on me in the off position after performing minor plumbing repairs.I will often use the main shut off at the street if I see an old gate valve. If you are required to use a gate by local codes (I don't know your codes but here in California a ball valve is fine) put the ball valve after it and use it for your shut off.
Q:aftermarket blow off valve info?
Don't do it. First of all, if you knew enough about turbo charging or supercharging, blow off valves, bypass values, hooters, etc., then you would have known we need to know the size of engine, model of turbo, piping diameter, etc. The actual control lines are not that complex. By using your tongue you can tell what each line is ported to, and then you just need to know if you blow off valve is operated by vacuum or lack of vacuum. They make both types. And your throttle body will have ports on both sides of the plate. And yes, it does very much matter. Turbo charging is not for the novice to fool around with.
Q:my valve cap is leaking slowing how do i fix it on my 95 jeep cherokee?
valve cap? like on the tire? shouldn't leak...replace valve stem
Q:chevy 350 exhaust valve seat pittings?
Your pics are too small and not clear enough for me to give you a 100% sure answer. My thought on this though is try to power lap the valves and see if that takes pitting out.. If not then you need a valve job. Lapping the valves won't put you out much. The lapping compond is pretty cheap. $5 or less for a tube of it, sold aty all parts stores. The common lapping is done with a lapping stick turning it by hand.. I recommed power lapping.. Get a lenght of 11/32 rubber hose, Put lapping compound on valve seat and valve face, put valve in head.. Put rubber hose on the valve stem, then chuck the other end of rubber hose into a hand held drill. I use a 1/2 chuck high torque drill for this. Now lightly push agaist the bottom of valve, will you trigger the drill and turn the valve around and around.. For yours do about 1-1.5 min, stop, push valve out some and look at seat, add more lapping compund if needed, then do it again This will machine the seat some.. It may be enough to clen up the pitting
Q:Water leaking from stop valve?
It's not the packing nut seal since that only seals the stem which is attached to the handle. There is an inner washer attached to that stem which shuts off the water, this is probably worn and needs replacement. Do not attempt to change this valve, leave it to a professional because it's not an easy thing to do, unless you're good at soldering. Shut off the main water supply that services the whole house. Also note: If you don't have wood behind the sheet rock from your existing vanity, you'll be in trouble, because the Pedestal must be bolted to the wall to be secure otherwise it's a safety hazard.
Q:Clarification on purge valve solenoid operation?
When okorder.com
Q:HELP!!! trumpet valve stuck?
Unscrew your valve, remove the bottom valve cap, and carefully push out the valve with a drumstick or something. Clean the valve off with a cotton swab and some vinegar, rinse it off gently with lukewarm water, oil 'er up, and put her back in. If you've messed your instrument up to the point where your valve caps are all stuck from lack of cleaning, you're going to have to take it to a professional. Don't force them with a tool or anything or you'll strip them. Haha, good luck. Matt
Q:Would a ERG valve cause sputtering or hesitating on my pontiac firebird?
If the EGR valve is opening on Acceleration yes this would cause hesitation,but you have to find out why it is opening if it is.If there is a solenoid controlling the EGR valve this might be the problem.If you can put your finger under the EGR valve when the engine is idling,rev then engine up in park,if you feel the valve opening it is most likly the solenoid
Q:Painting valve cover?
if i were you i would replace the gasket ! even if it don,t break taking it off it,s best to put a new gasket on when you pull the valve pan !

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