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BJ41W-16C insulation stop valve bj41h insulation stop valve jacket insulation valve DN20

price:USD$400.00
discount 70% in 2018-09-19 to 2018-09-21
price: USD$ 280.00
freight :USD$18.00,(Express)
freight :USD$7.00,(Postal parcel)
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Jacketed insulation stop valve

 

Jacketed insulation stop valveIt belongs to the forced sealing valve, so when the valve closes, the valve must be applied to the pressure, so as to force the sealing surface not to leak. When the medium into the valve six from the bottom of the valve, the operating force required to overcome the resistance, is the stem and the packing friction and pressure generated by the media thrust force than the valve off the valve opening force, so the diameter of the valve stem, otherwise it will bend the stem top of the fault. In recent years, the emergence of self sealing valve, globe valve replaced by medium flow on the top of the valve into the valve chamber, then in the medium under pressure, the valve off a small force, and force open the valve, stem diameter can be reduced accordingly. At the same time, under the action of the media, this form of valve is more stringent. China's valve "three to" has stipulated that the flow direction of the cut-off valve, all from top to bottom.

Jacketed insulation stop valveWhen opening, the valve opening height, nominal diameter of 25%~30%, the flow has reached the maximum, indicating that the valve has reached full open position. So the full stop valve position should be determined by the valve stroke.

Following advantages:

It is simple in structure and convenient in manufacture and maintenance.

Small working time, short opening and closing time.

Good sealing, friction between the sealing surface is small, long life.

Following shortcomings:

The resistance of the fluid is large, and the force required for opening and closing is larger.

It is not suitable for medium with large particles, high viscosity and easy coking.

Poor regulation performance.

Jacketed insulation stop valveAccording to the thread position of the valve stem, there are external thread type and internal thread type. According to the flow direction of the medium, there are straight through, DC and corner. The sealing valve is divided into sealing form, packing sealing stop valve and bellows sealing stop valve.

Jacketed insulation stop valveThe installation and maintenance should pay attention to the following matters:

The pipe stop valve operated by hand wheel and handle can be installed in any position of the pipeline.

Handwheel, handle and steering mechanism are not allowed to be used for lifting.

The flow direction of the medium should be consistent with the direction of the arrow shown in the valve body.

Liquefied gas valve, the valve is also called, is the most widely used as a valve, it is popular is because the process of opening and closing the sealing surface friction between the small, more durable, highly open small, easy manufacture, convenient maintenance, not only for low pressure, but also suitable for high pressure. Its closing principle is to rely on the valve bar pressure, so that the valve sealing surface and seat sealing surface close together, to prevent the circulation of media. Liquefied gas valve can only medium one-way flow direction when installing. Its structureThe length is greater than the gate valve, at the same time the fluid resistance is large, the long-term operation, the sealing reliability is not strong.

The jacket stop valves are divided into three types: straight through, right angle and DC type oblique stop valves.

Jacketed stop valveWhen opening, the valve opening height, nominal diameter of 25%~30%, the flow has reached the maximum, indicating that the valve has reached full open position. So the full stop valve position should be determined by the valve stroke.