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Gate Valves Structure Features
Blog, Valves Study,

Gate Valves Structure Features

Gate valves features: Low fluid resistance, Widely applicable pressure and temperature range, etc. Small external force required for opening and closing. Medium flow direction is not restricted. Simple body shape, and high performance casting It is one of the most commonly used cut-off valves, used to cut off or connect the medium in the pipeline. […]

Oct.27.2020
How to Protect Electric Actuators from Corrosion
Blog, Valves Study,

How to Protect Electric Actuators from Corrosion

COVNA, as a professional electric actuators manufacturer over 20 years, including: Modulating electric actuators: Adjust open/close angle from 0 to 90 degree. AC/DC power supply, signal control and manual override. High torque up to 4000Nm. On/off type electric actuators: 0 degree rotation. AC/DC power supply, signal control and manual override. High torque up to 4000Nm. Intelligence electric […]

Oct.26.2020
Electric Actuator Introduction
Blog, Valves Study,

Electric Actuator Introduction

Electric actuators and pneumatic actuators, are an important part of the control system. It receives the 4-20mA or 0-10mA DC current signal from the controller, and converts it into the corresponding angular displacement or linear displacement, to manipulate the valve, baffle and other control mechanisms to achieve automatic control.     Electric actuators are available […]

Oct.23.2020
Selection Of Pneumatic Actuator
Blog, Valves Study,

Selection Of Pneumatic Actuator

1. How to select pneumatic actuator? In modern working conditions, the use of pneumatic actuated on-off valves instead of manual valves can greatly improve the production efficiency of its products and the safety of production equipment. Regarding the selection of pneumatic actuated valves in the production of polyethylene products, we will introduce the selection of […]

Oct.22.2020
Pressure Safety Valve Inspection, Maintenance and Fault Elimination
Blog, Valves Study,

Pressure Safety Valve Inspection, Maintenance and Fault Elimination

1. Safety valve is an important safety accessory for special pressure equipment. Safety valve inspection is essential, as well The safety valve is an automatic valve, which does not rely on any external force but uses the force of the medium itself to discharge a rated amount of fluid to prevent the pressure from exceeding […]

Oct.22.2020
Precautions to the Use of Safety Valves
Blog, Valves Study,

Precautions to the Use of Safety Valves

The function of safety valves is to prevent the pressure of the medium in the pipeline or device from exceeding the specified value, so as to achieve the purpose of safety protection. The safety valve is a safety protection valve. Its opening and closing parts are normally closed under the action of external force. When […]

Oct.21.2020

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