Product Details

Product Design Features 

SerialPneumatic explosion-proof ball valveare mainly applied to natural gas,oil products,chemical engineering, metallurgy,city building,environment protection,pharmacy and food industries,among which the anti-sulphur series are used for long delivery pipes of natural gas that contains hydrogen sulphide medium,a lot of impurity and corrosive substances.

The main structure features include:

1.Specific Sealing Structure of Valve Base

Double cant elastic seal ring or V-shaped groove seal ring structural design is adopted to ensure sealing reliability.As for Iow-pressureo,ultralow pressure or vacuum-operated ball valves,a plate spring-loaded sealing structure of valve base is adopted to ensure

their longterm sealing reliability.As for moderate or high temperature ball valves,para-position polyphenylene or mental can be adopted for valve base material.

2.Automatic pressure relief structure

When the pressure in cloaca cavity increases singularly,the cavity medium can push valve base by its own thrusting force,which results in automatic pressure relief and valve security assurance.

3.Reliable Sealing of Valve Rod

The valve rod adopts downward installation structure with back sealing.The sealing force will increase together with the heig-htening of medium pressure,which can ensure the sealing reliability.Moreover,even if the pressure in valve cavity increases singularly,the valve

rod will not burst out.

4.Fire-resistant Structure

According to the operating condition and users requirement,ball valve can be designed with a fire resistant structure up to the fire-resistant standards of API607,API 6FA and JB/T6899.Once the soft seal ring is burnt out on fire,the structure can avoid serious leaking of  the medium and prevent the fire from scaling up.

5.Anti-static Structure

While operating the valve,the friction between the sphere and the base will produce static charges accumulating on the sphere.To avoid static sparkle,the fire-resistant device is designed to derive the accumulated static sparkle,charges from the sphere.

6.Locking Device

Alocking structure is designed on the full-open and full-close spots of manual ball valves to avoid abnormal open-and-close pro-duced by misoperation or unpredictable circuit vibration.On production lines of petroleum and chemicals of flammable mediums,and during

the course of outdoor piping,the design is especially advantageous and practical.

7.Full Bore Structure and Reduced Bore Structure

The two structure series are produced to meet different requirements of users.The passage inside diameter of full diameter ball valves is the same as that of valve pipe,which is convenient for pipe cleaning.The weight of retractive diameter ball valves is relatively lighter,but the fluid resistance is just 1/7 that of stop valves with the same caliber.Therefore,the application prospects of retractive diameter series is much better.

Main External Connection Dimensions