The electric on-off (on-off) regulating valve adopts double spool up and down guiding structure, equipped with electric actuator. The valve body is a three-way structure, namely one in two out (split flow type), two in one out (combined flow type), so as to achieve fluid mixing heating or cooling, or unequal fluid diversion, and meet the use requirements of different industries and mines. The valve body has the advantages of compact structure, light weight, sensitive action, small pressure drop loss, large valve capacity, flow characteristics and convenient maintenance. It can be used in various working conditions, especially in temperature control system of heat exchanger in petroleum industry and automation control system of other industries. This series of products include normal temperature type, high temperature type, low temperature type, regulating cut-off type, bellows sealing type, etc. The nominal pressure class of the product is pn1.6 and 4.06.4; the diameter range of the valve body is dn20-dn300; the applicable fluid temperature ranges from - 150 ℃ to + 560 ℃; the leakage class is divided into IV, V and VI; the flow characteristics are linear and equal percentage. A variety of specifications are available.

Note: normal temperature type: normal temperature type, working temperature - 20 - + 200 ℃, leakage grade is grade IV.

The high temperature valve cover is added with heat sink, which can be used in the occasions with medium temperature of - 60 - + 450 ℃.

The bellows seal type forms a complete seal for the valve stem moving up and down to block the fluid leakage.

The low temperature type adopts the structure of lengthened valve cover and heat insulation board, which can be used in - 196 ℃ cryogenic occasions.

Application scope of electric on-off control valve

The straight stroke shunt and confluence electric control valve is composed of three-way shunt and confluence valve with PS, 3810, zaz, DKZ series straight stroke electric actuators. There is a servo system in the electric actuator without additional servo amplifier. It can control the operation with input control signal (4-20madc or 1-5vdc) and single-phase power supply to realize the adjustment of pressure, flow, temperature, liquid level and other parameters. The balanced valve plug structure is adopted. The valve plug has the characteristics of good stability, low noise, large allowable pressure difference and simple connection. It is widely used in flow control In the industrial automatic control system of electric power, metallurgy, petroleum, chemical industry, environmental protection and other industries with large quantity coefficient and strict leakage requirements.

Technical parameters of electric on-off control valve

Principle and structure: three way double seat casting valve, nominal diameter: 25-300 mm

Nominal pressure: pm1.6, 4.0, 6.4Mpa

Connection type: flange jb78-59, jb79-59

Valve body material: HT200, zg230-450, zg1cr18ni9ti

ZG0Cr18Ni12Mo2Ti

Normal temperature: - 20 ℃ - + 200 ℃ heat dissipation: - 40 ℃ - + 450 ℃

Gland type: bolt compression type

Packing: V-type PTFE packing, flexible graphite

Stainless steel bellows of electric on / off control valve

Spool type: double guide double seat sleeve spool

Flow characteristics: equal percentage characteristics, linear characteristics, fast opening characteristics

Valve core material: 1Cr18Ni9Ti, 0Cr18Ni12Mo2Ti

Actuator of electric on / off regulating valve

Type: PS, 3810, zaz type (within DN 100) can be selected

DKZ type (above DN 100) electronic straight stroke actuator. Explosion proof type 3810