Q:I have put a new pressure valve and replaced both thermostat

If you have replaced the TP valve, more than likely there is a heating element shorted to the tank. This will cause continuous heating and high temp/high pressure...good luck.

Q:What are the advantages of butterfly valves?

Butterfly valve, also known as shutter valve, its advantages are:A. has a large circulation capacity and is about 1.2 times the same size as two seat valves;

Q:How do i use a valve spring compressor. It looks like a c-clamp, so don't tell me how to use a smaller one, but the bigger one.Thanks

The forked end goes over the valve retainer, the flat end with the screw goes against the valve face. Simply close the handle to compress the spring. You may need to adjust the width of the jaws to fit the retainer and adjust the length of the screw to compress the spring the right amount. Sometimes it helps to gently tap the edge of the retainer with a hammer to loosen the keepers before compressing the spring.

Q:Butterfly valves are widely used in 2.0MPa below the pressure and temperature of not more than 200 degrees of various media, right?

3. kinds of butterfly valve:According to the connection mode: flange type, clip type.According to the material of sealing surface, soft seal and hard sealing.According to the structural form, butterfly valves can be divided into the following types:Plate typeInclined plate typeOffset plateLever type4. butterfly valve features:(1) the structure is simple and the shape is small. The utility model has the advantages of compact structure, short structural length, small size and light weight, and is suitable for large caliber valves.(2) the resistance of the fluid is small, and when the valve is fully opened, the valve seat passage has an effective circulation area, so the fluid resistance is smaller.(3) open and close, convenient and quick, good adjustment performance, butterfly plate rotation 90 degrees can be completed headstock. By changing the angle of rotation of the disc, the flow can be graded.(4) the opening and closing moment is smaller, because the butterfly plate on both sides of the rotating shaft is basically equal to the medium, and the opposite direction of the torque is generated, so that the opening and closing is more labor-saving.(5) low pressure sealing performance, sealing surface materials generally use rubber, plastic, sealing performance is good. Limited by the material of the sealing ring, the pressure and the temperature range of the butterfly valve are smaller. But the use of hard sealing butterfly valve pressure and temperature range has been greatly improved.

Q:Butterfly valve is the control valve?

The flow characteristics of butterfly valves can be approximately equal percentage characteristics, with the positioner can do adjust, is mainly used in large caliber, straight stroke control valve more than 200 volume weight will be great, it suggests using the butterfly valve.

Q:The water supply pipe is the gate valve And on the cross dry pipe are the gate valve? To answer the 30

I suggest you find out the pressure and installation position first, the condition allows, you can choose butterfly, after all, much cheaper than butterfly valve. After the completion of the project, will be mainly engaged in the acceptance of problems, there are special management of fire units.

Q:How does PLC control butterfly valves?

PLC output signal, access to the butterfly valve actuator or locator, you can control

Q:Butterfly valve is generally used in what position?

It can also be used for switch control of low pressure pipeline medium.

Q:Do you use the straight stem butterfly valve in the fire fighting engineering?

Bar valve bar, did not hear the bar with butterfly valve, ah, there are pairs of folder and hand wheel type bar

Q:D what's the meaning of "one 71x one 1 butterfly"?

According to the provisions of the JB/T 308-2004 valve type programming method:D== butterfly valve7== clip typeLinetype in 1==X== sealing surface material: Rubber-1== pressure rating: 1.0MPa