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Product information
ZJH member type pneumatic diaphragm regulating valve
Overview
The ZJHP/ZJHM series of fine and small pneumatic diaphragm regulating valves are a new generation of actuators developed by our factory that absorb domestic and foreign advanced technology and comply with IEC standards. They are composed of a multi-spring adjustable zero actuator and a low flow resistance sleeve, and are single-seat adjusted without a lower cover. Valve composition. The volume ratio is 1/3 smaller, the weight ratio is 1/3 smaller, the flow capacity is 1/3 larger, the center of gravity is low, the shock resistance is good, and the installation is easy; the performance indicators are better than similar products, equivalent to foreign CV3000 series control valves, and are widely used Chemical, petroleum, light industry, power station, metallurgy and other industries.
structural principle, structure
It accepts the control signal pressure output by the regulator's standard electrical signal (via an electro-pneumatic positioner or an electro-pneumatic converter) and changes the valve opening to change the flow of the regulated medium and adjust parameters such as flow, pressure, temperature and liquid level. be adjusted to realize the automation of the production process. After the external pneumatic pressure signal is input to the diaphragm chamber, this pressure acts on the diaphragm to generate thrust. This thrust compresses the spring group and moves the push rod to drive the valve stem to open (close) the valve core until the thrust and spring group are compressed. until the final reaction force is balanced and stabilized at a certain position in the stroke. According to the above principle, it can be seen that the valve core displacement has a certain proportional relationship with the input pressure signal.
ZJHP系列气 | Dynamic single seat control valve ZJHM series pneumatic sleeve control valve HTS single seat control valve HCB cage double seat control valve | ||||||||||||||||
Corresponding model of CV3000 | HLS small diameter single seat control valve | ||||||||||||||||
Nominal diameter DN (mm) | 20 | 25 | 3 2 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | ||||
10 | 12 | 15 | 20 | ||||||||||||||
Rated flow coefficient Cv | High-precision flow characteristics valve core | 1.6 | 2.5 | 4.0 | 6.3 | 10 | 1 7 | 24 | 44 | 68 | 99 | 175 | 275 | 360 | 630 | 900 | 1440 |
High capacity flow characteristics spool | 1.8 | 2.8 | 4.4 | 6.9 | 11 | 2 1 | 30 | 50 | 85 | 125 | 200 | 310 | 440 | 690 | 1000 | 1600 | |
Rated stroke(mm) | 10 | 16 | 25 | 40 | 60 | 100 | |||||||||||
Film effective area cm² | 280 | 400 | 630 | 1000 | 1600 | ||||||||||||
inherent adjustability ratio | 50:1 | ||||||||||||||||
Nominal pressure MPa | 1.6、4.0、6.4 | ||||||||||||||||
Working temperature℃ | Normal temperature type:: -20~200、 -40~250、 -40~450 | ||||||||||||||||
Ambient temperature℃ | -30~+70 | ||||||||||||||||
Air source pressure KPa | 0.14、0.25、0.40 | ||||||||||||||||
Spring range Kpa | 20~100(Basic type)、40~200、80~240 | ||||||||||||||||
Connector thread | G1/4",M16X1.5 |
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