Ductile Iron Double Air Valves

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Specifications

Double flanged Double Eccentric Butterfly Valve
PN10/16/25
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)

Q: I have a 66' malibu el camino with a 283 sbc and a powerglide transmission! I have bee noticing a ticking noise on the motor and it miss kind at a rhythm. I took the valve covers off and noticed pieces of metal right by the front of the motor on the head. It is where the #1 piston is. Some of them have kind of a rounded off shape to them. I dont see anything wrong with the springs. but its dark and i cant really see. I also noticed on the even side 2/4/6/8 some of the rocker arms are loose? Some may be loose on the odd side too. not sure, i didnt check them. I found them right where the hole is where im guessing where the oil comes in. What do yall think? It idles kind of rough and i have noticed a loss of power? do i have broken valve springs or something? Thanks for the answers!!!!: on the valve stem you have 2 keepers, they are small and curved and it could be one of them ! someone worked on that engine before you and either did not put both keepers in or one popped out !

Q: I have a yamaha cornet and i took the valves out to oil them. i put the valves in, and now only the middle on makes a sound. when i put down no valves, and doesn't make a sound, only when i press down valve two. i think it is the way i put the valves because it has those holes. can some one let me know what is the right way to put the valves in, like explain or show me a video. thanks.: I play a baritone, but I hope I can help. On my instrument there are little notches at the tops of the valves. I had to spin my valve until I heard a slight click then I would push down on the valve to make sure it worked. (I would start on the first valve) Then to make sure that I had it in right I would blow in the instrument to see if the air went through the holes. Try that, it might help. Also, the next time you take your valves out keep them in order and in the position they came out in.

Q: I have a 1997 ford aerostar and my mechanic just called me and said that the pop off valve needs to be replaced, but it is attached to the line so the hole line has to be replaced to. I want to try to find the pop off valve to see if I can get it b/c he can't find the replacement part, what I need to know is what it looks like. or where it is on an aerostar, because I have 5 more sitting in the driveway and I can look for it.: 1. the pop off valve is normally located in the compressor so if it over pressures it will relieve some of the pressure. it's not in a line. #2. if it's a 1997 it doesn't have R12. it has R134. the only valve in the line is the port to check pressures and vacuum and recharge it. it could have one of those valves leaking and most can be taken apart and a new schrader valve installed. hope this helps.

Q: Is a Head gasket the same thing as the valve cover gasket, on my honda civic si?: Head gasket is between the head and block. It's primary job is to cushion between the two, dealing with high temperature and pressures of combustion process. So it helps in maintaining combustion chamber pressure, sealing coolant, sealing oil passages between the two parts (head block). Requires major disassembly to replace if needed, and may only be part of a larger looming problem in the motor. Valve cover gasket is between top of head and valve cover. For your Honda, it involves a large rubber/neoprene o-ring that fits in a groove channel in the valve cover, specially formed for the shape of it. Also with it, should change out the other smaller seals that go around the spark plug tuges, and valve cover hold-down studs. If you have oil leaking around the outside edge of the valve cover and in the spark plug wire tubes, you can buy the set and have it easily replaced or do yourself if have the tools skill.

Q: what the valves adjustment spies in the 1979 Mercury-marine engine, 6 cylinder in-line 165hp 4.089L?: From 0 lash turn the rocker arm nut 3/4 turn. Before you start, lay some rags under the engine to ketch the oil. The engine needs to be running. Loosen each nut until you hear the rocker arm stat to click, then tighten it slowly until the clicking stops, your now at 0 lash, now tighten the nut down 3/4 turn or 270 degrees, don't do this to fast the lifter needs to adjust. After adjusting, take a center punch held at 45 degree angle and punch the stud and top of the nut, this will assure the nut stays adjusted and wont back off. Put the valve cover on and wash the oil off, a spray can of brake cleaner works great. Remove the rags and your done. Happy boating. .

Q: what exactly is thc pcv valve and what does it do: The positive crankcase venitlation (PCV) valve allows a vent for gases which naturally buid up in an engine. In the 60's, it was vented out into the atmosphere. California Air Resources Board (CARB) passed legislation stopping the practice. Instead of venting, it now burns through the normal combustion process. The PCV valve regulates how much is allowed to pass through, because, at idle, if too much is allowed to go into the engine, a rough idle or stalling would occur.

Q: Kenmore washer ,cold water trickles in, pressure from faucet OK. Must entire valve be replaced?: You probably can not find a rebuilt valve or get the parts to rebuild one. If needed, it will probably need to be completely replaced. There is a good chance you do not have a valve issue. Turn the water valve off and remove the cold water line at the back of the washer. Inside the hose or on the washer itself, there should be a metal screen in the line that somewhat filters the valve and protects it from getting clogged with sediment. Remove the screen and clean or replace it. If the screen wire is not at the washer end try the valve end of the cold water line. While your there you may want to clean the hot water side also. If you are unable to clean the screen, new ones are available for minimal money at hardware stores. Yes the screen wire is necessary, by removing the line additional sediment may very well go into the valve when you turn on the water and cause a valve problem if you don't have one now.

Q: I want a valve sound that is clean and 'true', but I also want pre-sets. Someone said that digital pre-sets distort the valve sound.: First off, valves aren't meant to be clean or true. Technically the reason we like tubes is that they distort fairly easily, but in a pleasing and musical way (largely 2nd order, etc). Just being picky. =) Digital things can sound very digital in a tube amplifier depending on the quality of the DSP chip and how it's used. It looks like what they're doing in this case is modifying the gain values of the tubes digitally. This doesn't actually interfere with the signal itself. It's kinda like using a digital thermometer to control your heater instead of an analog one, or turning it on and off by hand - the heat still comes out, the method of when and how much comes out is all that changes. I'm very impressed with this amp. Whoever said that digital presets distort the valve sound were talking about something else - maybe the Line 6 Spider 3 or something, where the distortion doesn't come from the valves but from a DSP chip. Your amp there is a different beast completely. Saul

Q: Its a 1981 Monte Carlo SS with a GM 350 crate motor. There is oil all over the heads valve covers. It isn't my car, but I was thinking of buying it..Thank you.: Sounds like bad valve cover gaskets. Not too big of a job.

Q: like my Acura has a 16v 4clyinder engine , and i dont know what valves does , the more vavles the faster?: Valves are in the Cylinder Head, They let Air and Fuel into the combustion chamber. 4 vavles let more air and fuel in than 2 vavles, Which makes more power.

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