Valve advantages

1 fluid resistance small, the drag coefficient with the same length of pipe equal.
2 has the advantages of simple structure, small volume, light weight.
3 closely reliable, current High pressure needle valve sealing surface material widely used plastic, good sealing performance, in the vacuum system has also been widely used.
4, the operation is convenient, quick open and close, from fully open to fully closed as long as the rotation of 90 DEG, facilitate remote control.
5 ball Valve manifolds has the advantages of simple structure, convenient maintenance, seals are generally activities, the removal of the replacement is more convenient.
6 in the fully open or fully closed, the ball and seat sealing surface and the dielectric isolation, through the media will not cause erosion of the valve sealing surface.
The 7 is suitable for a wide range, from small diameter to a few millimeters, a few meters from the large, high vacuum high pressure can be applied.

Instrumentation needle valve Product Description

Instrument measuring Instrument needle valve  is an important part of the piping system, the main shut-off valve and ball valve, its function is to be used to turn on or off the pipeline path. Card sets with easy installation and removal instrument valves, connections are tight, there is conducive to fire, explosion and high voltage capability, good sealing performance, etc., are power plants, oil refineries, chemical plant piping and instrumentation to measure an advanced connection valve. Needle shut-off valve sealing good, long life, even after the sealing surface is damaged, only need to replace wearing parts, you can continue to use.

Instrumentation needle valve

Instrument needle valves, instrument measuring the piping system is an important part of the main shut-off valve and ball valve, mainly used for cutting the pipe open or access available. Installation Notes: Valve must be visually inspected prior to installation, the valve plate should comply with existing national standards, "Universal Valve logo" GB 12220's. The outer surface of the instrument needle valve body also affected by atmospheric corrosion, general steel materials to paint to protect.

The classification of ball valve

One, floating ball valve
Ball High pressure needle valve ball is floating in the medium under pressure, can produce some displacement of the sphere, and pressed in the export side of the sealing surface, to ensure that the exit seal. Floating ball valve structure is simple, good sealing, but the ball under the load of all media work to export ring, so to consider the ring material can withstand the work load of the media sphere. This structure, widely used in low-pressure Stainless steel needle valve
Two, fixed ball valve
The ball valve is fixed, no movement after compression. Fixed with a floating ball valve ball valve seat, by the media pressure, the valve seat have a mobile, so that the sealing ring is pressed on the sphere, in order to ensure the sealing. Usually with the ball in the upper and lower shaft with bearings, operating torque, suitable for high pressure and large diameter of the valve. In order to reduce the valve operating torque and increase the reliability of the seal, valve seal has emerged in recent years, both pressure lubricating oil special note in the sealing surface, to form a layer of oil film, which enhances the sealing, and reduce operating torque, more suitable for large-diameter high-pressure valve.
Three, elastic ball valve
The ball valve is flexible. Ball and valve seat rings are made of metal materials, sealing pressure than the large, rely on the media itself can not seal the pressure has reached the requirements must be imposed by external forces. This valve is suitable for high temperature and high pressure medium. Elastic sphere is a flexible open slot in the sphere of the bottom wall, and get flexible. When the closed channel, with the stem of the wedge-shaped head to open up the ball with the valve seat to seal compression. In the rotating sphere before loose wedge head, ball the subsequent restoration of the original prototype, so that a small gap between the ball and the valve seat sealing surface can reduce friction and operating torque.

Globe valve

Ball valve driven by the stem, and around the Trunnion ball valves axis rotate valve. Can also be used to regulate and control fluid, strong shear force between the metal seat which seal V type ball Instrumentation ball valve of the V type ball core and hard surfacing alloy, especially suitable for containing fiber, small solid particles and other media. Switch and multi way valve in the pipe can flow, diversion, and flows to the flexible control of media, but also to turn off any channel and the other two channels connected. The valve should be installed in the pipeline in the general level of. Valve classification: pneumatic valve, electric valve, manual valve.

Conditions Instrument needle valve inspection

Instrument needle valve is a simulation test in the normal state. This state should be able to cover all water department environment. Dynamic test valve executive function Another very important point is that the test voltage, what kind of voltage the most appropriate? High pressure ball valve Smart meter in every one has a same function, that is, when the battery voltage is below the set value, the microcontroller will command the valve closing function is activated, Valve manifolds when the battery voltage is the lowest in the smart meter voltage Instrument needle valve, also that is, the final action is the lowest setting off valve in the battery voltage. The task of the truth is by reversing valve to the valve dredge or occlusion. Instrument needle valve switch is lightweight, small size, can be made very large caliber, reliable sealing, simple structure, Instrument needle valves convenient maintenance, regular spherical surface and seal in the closed condition, can not easily be eroded media, in all sectors lost universal use.

Needle valve structure analysis

Needle valve is solid move after pressure does not occur. With a floating ball valve are firmly seat after by media pressure, move the seat occurs, the seal is pressed onto the ball, Needle valve in order to protect the seal. Weekdays with the ball, the lower shaft with bearings, manipulating small torque, useful in high-pressure valve with large diameter. Needle valve characteristic is horizontal, and the flow is upward mobility, so the valve is closed the water pressure on the valve play a significant role in the film is, the higher the pressure the better sealing performance. Needle valve when the valve is working as a plane rotation, need to overcome the friction coefficient between the valves, Instrument needle valve and the impact it's not as big hydraulic valve. But to overcome the friction in the water under the lamination pressure. Was friction between the laminations through practical experiment, several Corfu little force increases.