Hydraulic control valve works

1, the concept of hydraulic control valve: hydraulic control valve is a water pressure control valve, which consists of a main valve and attached to the catheter ﹑ pilot valve ﹑ ﹑ ball valve and Pressure Gauge and other components. 2, the type of hydraulic control valve: According to the purpose of use, function and place can be evolved into a remote control float valve, pressure reducing valve, slow closing check valve, flow control valve, pressure relief valve, hydraulic electric control valve, water pump control valve Wait. According to the structure can be divided into two types of diaphragm and piston. 3, the hydraulic control valve diaphragm type and piston type two types of valves work the same principle, are based on the upstream and downstream pressure difference △ P as the power by the pilot control, so that the diaphragm (piston) hydraulic differential operation, completely by the hydraulic automatic Adjust so that the main valve disc is fully open or fully closed or in regulation. When the pressure water entering the control chamber above the diaphragm (piston) is vented to the atmosphere or downstream low pressure zone, the pressure acting on the bottom of the valve disk and under the diaphragm is greater than the pressure above, pushing the main valve disk fully open (Piston) above the control chamber pressure water can not be discharged to the atmosphere or the lower reaches of the lower pressure zone, the role of pressure on the diaphragm (piston) is greater than the pressure value below, it will be the main valve disc Pressure to the fully closed position; when the pressure value in the control chamber above the diaphragm (piston) is between the inlet pressure and the outlet pressure, the main valve disc is adjusted and its position of adjustment depends on the needle valve and the adjustable Pilot valve joint control. Adjustable pilot valve through the downstream outlet pressure and with its changes to open or close its own small valve port, thereby changing the diaphragm (piston) above the control room pressure value, control valve plate valve position adjustment.

Pressure Transmitter

pressure transmitter is a device that converts pressure into a pneumatic signal or an electric signal for control and remote transmission. Pressure Sensor can convert the physical pressure parameters such as gas and liquid felt by the load cell sensor into a standard electrical signal (such as 4~20mADC, etc.), to supply secondary instruments such as indicating alarms, recorders, regulators, etc. for measurement and indication and process regulation.

Pressure transmitters are used in various industrial automatic control environments, involving water conservancy and hydropower, railway transportation, intelligent buildings, production automatic control, aerospace, military industry, petrochemical, oil wells, electric power, ships, machine tools, pipelines and many other industries.

There are two types of pressure transmitters: electric and pneumatic. The uniform output signal of the electric type is a direct current signal such as 0-10mA, 4-20mA or 1-5V. The unified output signal of the pneumatic type is the gas pressure of 20-100Pa.

Pressure transmitters can be divided into force (torque) balance type, capacitive type, inductive type, strain type and frequency type according to different conversion principles.

Our advantageous products are mainly compact pressure transmitters, pressure transmitters with display, differential pressure transmitters, wind pressure transmitters, etc.

The main advantage

1. The pressure transmitter has the characteristics of reliable operation and stable performance

2. Dedicated V/I integrated circuit, less peripheral components, high reliability, simple and easy maintenance, small size, light weight, and extremely convenient installation and debugging;

3. Aluminum alloy die-casting shell, three-terminal isolation, electrostatic spray protection layer, durable;

4. 4-20mA DC two-wire signal transmission, strong anti-interference ability and long transmission distance;

5. LED, LCD, and pointer three kinds of indicator heads, the on-site reading is very convenient. Can be used to measure viscous, crystalline and corrosive media;

6. High accuracy and high stability. In addition to the imported original sensor that has been corrected by laser, the comprehensive temperature drift and nonlinearity of the whole machine within the operating temperature range are finely compensated.

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