Q347F type extension rod ball valve

Structure and characteristics

Full bore design

According to customer requirements, full-diameter or reduced-diameter valves can be provided. Full-diameter valves have a channel diameter that is exactly the same as the inner diameter of the pipe, reducing eddy currents and facilitating pipe cleaning.

Obstruction and excretion function

The fixed ball valve adopts spring preload, the valve seat is sealed with double pistons, and the piston principle is used to seal, the upstream and downstream valve seats block the fluid, the valve body is equipped with a vent valve for emptying, and the valve bottom is equipped with a drain valve for draining, which is convenient for pipelines. Clean.

Automatic pressure relief

When the stagnant medium in the valve cavity rises abnormally due to temperature rise, the outlet end of the valve seat has an automatic pressure relief function. At the same time, a safety valve can be installed on the valve body as needed to ensure that the valve body has an automatic pressure relief function and ensure the pipeline Safety.

Fireproof structure

In the event of a fire or abnormal heating that causes the PTFE to soften and burn, the fire-proof sealing surface of the valve seat support ring can be contacted with the sphere, which plays a sealing role and complies with API607 and API6FA.

Sealed emergency rescue

Due to the accidental failure of the valve seat sealing caused by the magazine or fire in the medium, the grease injection valve provides a quick connection with the grease injection gun, which can inject the sealing grease into the seat sealing part conveniently and quickly, and alleviate leakage.

Anti-static design

The use of chromium-nickel stainless steel springs and small balls make the ball, valve stem and valve body conductive to each other, thereby completely releasing static electricity.

Operational reliability

The relative linkage (valve seat and stem bearing) of the large-diameter ball valve adopts Teflon with a small friction coefficient, so the operating torque is small. In addition, the sealing and lubrication makes the operation more flexible.

Valve seat structure

There are two valve seat structures: single-sealed box and double-sealed structure. Generally, the one with automatic pressure relief is a single seal, and the double-seal is an additional safety relief on the valve body.

Lengthened stem

The lengthening of the filling valve stem is suitable for buried and low-temperature use, and the lengthening size is determined according to the needs. The operation methods include manual, pneumatic, electric, gas-liquid linkage, etc.

Safety of external pressure

The wall thickness of the valve body is designed in accordance with the safety regulations of the high-pressure vessel, and meets the requirements of API6D for bearing external force and bending resistance, and has sufficient strength.