Do you know the maintenance of the stop valve?

Release time:

2021/05/21 14:51

Repair of external valve leaks. When the packing gland is relatively loose and leaks due to packing wear, the valve can be closed and the packing gland can be tightened again. If the method of pressing the packing gland cannot eliminate the leakage, the packing loses its elasticity and has no compensation ability, and the packing should be replaced completely.

Causes of external and internal leakage of the valve

Release time:

2021/05/21 14:50

After the use of the valve, due to the medium temperature, pressure, corrosion and the relative movement of the contacts, the following problems often occur. Leakage is divided into two types, namely external leakage and internal leakage. Leakage to the outside of the valve is called leakage, leakage is common in the stuffing box, flange connection.

Applicable occasions and selection principles of stop valve

Release time:

2021/05/21 14:47

The applicable occasions and selection principles of the cut-off valve:(1) the cut-off valve should be selected on the pipeline or device of high temperature and high pressure medium. Such as thermal power plants, petrochemical system of high temperature, high pressure pipeline. (2) On the pipeline with lax requirements on the flow resistance. That is, the pressure loss is not considered.

Introduction to the structure of the stop valve

Release time:

2021/05/21 14:46

Globe valve by the stem to drive the valve for lifting movement, change the distance between the valve and the valve seat, to achieve open or close the channel. In order to make the valve in the closed state does not leak, valve and valve seat sealing surface must be reliable, the sealing surface can be in the valve body, valve directly processed, can also be mounted sealing ring or surfacing other metal, sealing ring material is often stainless steel, copper alloy, hard alloy, rubber, plastic and so on. The connection between the valve flap and the valve stem should be movable connection, that is, the center line of the valve flap can deviate from the valve stem axis in any direction to ensure that the valve flap can be closely fitted with the valve seat, that is, it has a self-adjusting effect.

What are the characteristics of static balancing valve and dynamic balancing valve?

Release time:

2021/05/21 14:44

Balancing valve is in the hydraulic conditions, play a dynamic, static balance adjustment valve. Such as: static balance valve, dynamic balance valve. Static balancing valve is also called balancing valve, manual balancing valve, digital locking balancing valve, two-position regulating valve, etc. It changes the flow resistance through the valve to achieve the purpose of adjusting the flow by changing the clearance (opening) between the valve core and the valve seat. Its function object is the resistance of the system, which can balance and distribute the new water according to the proportion calculated by design, and each branch can increase or decrease proportionally at the same time, it still meets the flow demand of part load under the current climate demand and plays a role of heat balance.

Installation Precautions of Manual Balance Valve

Release time:

2021/05/21 14:42

Balancing valve is a valve that exists to regulate the medium flow pressure at both ends of the valve body. It is a special valve device, and its particularity is mainly due to the particularity of the system in which it acts. Manual balancing valve is a one-time manual adjustment, can not automatically change with the system conditions and change the resistance coefficient, so called static balancing valve.
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