Electric gate valve, electric knife gate valve, plate gate valve, flat gate valve, electric regulating valve, DN800, customizable

Electric Gate Valve

Keywords: Electric Gate Valve, Electric Knife Gate Valve, Gate Valve, Flat Gate Valve, Electric Control Valve

Model: DN150, DN200, DN300, DN400, DN500, DN600, DN800 (Non-standard models can be customized)

Introduction:

The electric gate valve is a type of gate valve. This electric control valve adopts various types of inner parts materials, which can expand the application scope of the valve. By using sulfur-resistant materials and special surface treatment processes, the valve can be applied in occasions with sulfur-containing media.

Structural Features of Electric Gate Valve:

① The valve adopts a pressure self-tightening seal or a structure of valve body and bonnet gasket seal, ensuring safe and reliable use.

② The valve disc adopts a double-gate structure with a universal top in the middle, which can automatically adjust the fit degree between the valve disc and the valve seat sealing surface to ensure the sealing of the valve. Meanwhile, this structure is convenient for maintenance, saves costs, and has good interchangeability of the valve disc.

③ The sealing surfaces of the valve disc and valve seat are made of cobalt-chromium-tungsten hard alloy by plasma spray welding, which have high hardness, wear resistance, scratch resistance and long service life.

④ The valve stem is made of nitrided steel, with nitriding treatment on the surface, featuring high hardness, scratch resistance, corrosion resistance and long service life.

⑤ The electric actuator is equipped with a torque control mechanism, an on-site operation mechanism and a manual-electric switching mechanism. Besides local operation, it can also perform remote operation, PLC control, 4~20mA current input/output intelligent control, etc.

⑥ The manual valve is opened by a manual mechanism or a handwheel when impacted, reducing the operating force of the valve.

⑦ The valve can be installed at any position of the pipeline. Meanwhile, carbon steel or alloy steel valves can be selected according to the medium and its temperature.

⑧ During initial installation and commissioning, the valve must be manually opened to about half position to avoid damage to the valve or electric actuator caused by reversed phase sequence of the motor.

Structural Introduction

Straight-stroke electric gate valve: Simply put, it uses an electric actuator to control the valve, thereby realizing the opening and closing of the valve. It can be divided into two parts: the upper part is the electric actuator, and the lower part is the valve.

Operation Principle of Electric Gate Valve: An electric valve is usually formed by connecting an electric actuator and a valve, which becomes an electric gate valve after installation and commissioning. The electric gate valve uses electric energy as power to drive the valve through the electric actuator, realizing the opening, closing and regulating actions of the valve, so as to achieve the purpose of opening, closing or regulating the pipeline medium.

Uses of Electric Gate Valve: Used for analog regulation of medium flow in liquid, gas and wind system pipelines, it is AI control. In the control of large valves and wind systems, electric valves can also be used as two-position switch control. In petroleum applications, power applications, etc., it can have AI feedback signals and be controlled by DO or AO, and is more commonly seen in large pipelines and wind valves.

Features

1. Compact structure, reasonable design, good valve rigidity, smooth flow path and small flow resistance coefficient.

2. The sealing surfaces are made of stainless steel and hard alloy, with long service life.

3. Adopts flexible graphite filler plate, reliable sealing and light and flexible operation.

4. Driving methods include manual, electric, pneumatic and gear transmission. Structural forms include elastic wedge single valve, rigid wedge single valve plate and double gate types.

5. Widely applicable as an opening and closing device for connecting or cutting off media in oil, water and steam pipelines of petroleum, chemical, thermal power plants, etc.

6. The gate valve is labor-saving in opening and closing.

7. The medium flow direction of the gate valve is not limited, no flow disturbance and no pressure reduction.

Structural Classification

A gate valve generally consists of a valve stem, valve body, bonnet, gate, driving device and other parts (fasteners, valve stem nuts, sealing packing).

Place the welding wire or welding rod on the pipe socket inside the valve. When the welding rod or welding wire enters the joint, move the flame away from it. When the alloy flows into the joint, move the flame back and forth. After reaching the appropriate temperature, the alloy will quickly and easily flow into the space between the pipe shell and the valve casing. After the joint is filled, the edge of the welding alloy will be visible.

When the solder is in a viscous state, use a brush to remove excess solder. After the solder cools, wrap a strip around the port of the valve.