Electric eccentric hemisphere valve, pq940h electric eccentric hemisphere valve, is widely used in Zui good equipment for coal powder injection, control method gas, granular fluid and powder foam solid medium transportation. The electric eccentric hemisphere valve is composed of angular stroke electric actuator and eccentric hemisphere valve. The actuator adopts integrated structure, and the electric actuator has built-in servo system. The operation can be controlled by inputting 4-20mA control signal or 1-5vdc and 220VAC power supply. The electric eccentric hemispherical valve is a kind of angular stroke regulating valve which controls the fluid by rotating part of the ball valve plate around the eccentric axis. The rotary center of the valve core is not concentric with the rotating shaft, which can reduce wear and prolong service life. A guide wing is set at the rear of the valve core, which is conducive to the stable flow of fluid and has good stability. Secondly, it has the characteristics of large flow and wide adjustable range. Electric eccentric hemisphere valve (CAM flexure control valve) is widely used in petroleum, chemical, electric power, metallurgy, iron and steel, paper, medicine, food, textile, light industry and other industries.

The actuator (or wrench) drives the valve stem to force the ball of the closing part to rotate around the center a, and the ball moves from point B to point C. relative to the center point O of the valve, the trajectory from B to C is a cam like eccentricity. When the valve is turned right into the valve seat, the valve is closed and keeps good sealing. According to the cam principle, the force acting on the valve seat increases gradually from the opening to the closing of the valve The surface of the closing part is separated from the valve seat completely, and the sealing specific pressure is gradually increased until it is completely sealed, otherwise, it is open.

1. Water loss is zero. After the valve is opened, the flow channel is completely unblocked and the head loss is zero. It can save a lot of energy.  
2. Reliable sealing mode. The soft sealing structure has self sealing performance, and the hard sealing structure has elastic compensation performance.  
3. Wear resistance and long service life. After the ball valve is opened, the ball crown is biased in the valve body and is not directly washed by the medium.  
4. Automatic cleaning function. The edge of the ball crown of the hard seal eccentric hemisphere valve adopts the blade shape, which can not only scrape off the dirt on the valve seat, but also cut off the debris.  
5. Fast opening and closing. The eccentric crankshaft can be opened and closed by 90 degrees, and the opening and closing time is short
6. Suitable for high flow rate. Through flow channel, solid eccentric crankshaft make it suitable for high flow rate without vibration.  
1. Applicable medium: clear water, raw water (including sediment), sewage, sea water, steam, gas, natural gas, oil, etc.  
2. Applicable temperature: soft seal eccentric hemisphere valve is - 40 ℃ - 135 ℃; hard seal semi valve is from normal temperature to 600 ℃
3. Applicable pressure: pn6-pn64.  
4. Nominal diameter: DN50 ～ DN 1200

Hemispherical valve products are divided into six series according to their applications: general valve, pipeline valve, slurry valve, gas valve, Petrochemical valve and pulverized coal injection valve. In petroleum, chemical industry, metallurgy, electric power, gas, ash discharge, coal powder injection and other industries, it is the replacement product of gate valve, globe valve, Y-type valve and ball valve.

 

Valve body: WCB CF8 CF8M zg1cr18ni9ti
Ball: hard seal: zg1cr18ni9ti soft seal: CF8 / CF8M
Valve seat: hard seal: 2Cr13, 1Cr18Ni9Ti, soft seal: PTFE ppl
Working temperature: hard seal: - 40 ～ 425 ℃, soft seal: - 28 ～ 250 ℃

The design and manufacture are in accordance with API6D GB / t12237-1989;
Test and inspection shall be in accordance with ap1598 JB / t9092-1999;
Flange size GB / t9113-2000 JB / t79-1994 hg20592-1997;
The structural length is as per kyv-2000