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3PC Ball Valves Working Principle
Blog, Valves Study,

3PC Ball Valves Working Principle

The working principle of the three-piece ball valve is as follows: 1. Opening process  In the closed position, the ball is pressed against the valve seat by the mechanical pressure of the valve stem. When the handwheel is turned counterclockwise, the valve stem moves in the opposite direction, and its bottom angular plane makes the […]

Oct.20.2020
Ball Valve Installation and Maintenance
Blog, Valves Study,

Ball Valve Installation and Maintenance

There are manual ball valves, pneumatic ball valves, electric ball valves   1. Installation of ball valve Preparation before installation: The pipelines before and after the ball valve are ready. The front and rear pipes should be coaxial, and the sealing surfaces of the two flanges should be parallel. The pipeline should be able to […]

Oct.19.2020
Ball Valves Application Fields
Blog, Valves Study,

Ball Valves Application Fields

Since the ball valve usually uses rubber, nylon and polytetrafluoroethylene as the seat sealing ring material, its use temperature is limited by the seat sealing ring material. The cut-off function of the ball valve is achieved by pressing the metal ball against the plastic seat under the action of the medium (floating ball valve). Under […]

Oct.16.2020
Ball Valves Structure, Characteristics, Advantages & Classification
Blog, Valves Study,

Ball Valves Structure, Characteristics, Advantages & Classification

The ball valve is evolved from the plug valve, which has the same lifting action of 90 degrees. The ball valve can be closed tightly with only a 90-degree rotation and a small torque. The completely equal internal cavity of the valve provides a straight flow channel with little resistance for the medium. The main […]

Oct.16.2020
Ball Valve Introduction
Blog, Valves Study,

Ball Valve Introduction

1. Ball valve structure The ball valve is evolved from the plug valve. Its opening and closing part acts as a ball, which uses the ball to rotate 90 degrees around the axis of the valve stem to achieve the purpose of opening and closing. COVNA manufactures electric ball valves, pneumatic ball valves, manual ball […]

Oct.15.2020
Butterfly Valve Sealing Principle
Blog, Valves Study,

Butterfly Valve Sealing Principle

The sealing structure of the series of butterfly valves produced are: single eccentric seal, double eccentric seal, triple eccentric seal, variable eccentric seal, and the sealing principles of various structural types of butterfly valves are briefly described as follows: 1. The sealing principle of single eccentric sealing butterfly valve Since the center of rotation of […]

Oct.15.2020

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