Archives: Answers

The sealing of the globe valve is mandatory. It relies on the axial force of the valve stem to act on the valve disc, generating enough force to make the sealing ratio reach the required specific pressure, so as to achieve sealing.

Simple and compact structure, good sealing performance and high pressure resistance; Small opening height and short opening and closing time; The sealing surface is not easy to wear and scratch; Long service life; The upper seal can protect the packing; However, it has large flow resistance, large opening and closing torque, small scope of application and small caliber.

It is used to cut off the medium in the pipeline

Small flow resistance, quick and convenient switch, small size, light weight, good sealing and long service life; High safety and reliability; It is convenient for maintenance, and it can self relieve pressure and sweep the line through the ball.

Cut off and split flow (three-way and four-way ball valves) and adjust (V-type ball valves).

The external force acts on the upper end of the valve stem to drive the hoist (ball) to rotate 90 °around the center line of the valve body to complete the function of cutting off the valve section or changing the flow direction of the medium.

Floating type and Trunnion type.

The channel inner diameter of full bore ball valve is consistent with the inner diameter of pipeline, which not only minimizes fluid resistance, but also facilitates pipeline cleaning.
The fluid resistance of necked bore ball valve is much less than that of the globe valve with the same caliber while its weight is 30% lighter than ball valves with the same caliber.As a result,it can effectively reduce both the production cost and price,and is relatively widely used.

Yes, the valve stem is downloading,with its inverted sealing structure with sealing gasket. The force of inverted sealing structure will increase while the medium pressure in the valve cavity increases,to ensure the sealing effect of the stem.In case of abnormal pressure increasing of the valve cavity,the stem won’t be impacted out.The filler is designed with proper V shaped structure,which can effectively convert the medium pressure inside the valve cavity and the locking force of outer gland into the sealing force of stem.

Yes, according to the customer’s requirements, the ball valve can be designed as a fire-resistant structure. In case of fire and the seal ring is damaged, every sealing part part of the ball valve can form the structure of metal to metal hard seal, which can prevent the spreading of both the media and fire.

Yes, according to the customer’s requirements, the ball valve can be designed as an anti-static structure, namely, mounting conductive spring between the globe body and stem,or between the stem and body.There after the static engendered during opening the valve could be conducted to pipelines then earth through the pre-set static passage to clear static away.The design works to prevent igniting combustible medium by static fire-striking for the system safety.

Yes, for the valves installed outdoor,those preventing improper operation of non-workers and valves,of which collision of its stem in relatively violent vibration occasions easily causes improper operation,a locking bore can be set in the fully open position or fully closed position and a lock can be used if needed,for the purpose of security insurance.