About UsContact us 点击询价 The website only displays some of the products. For more information, please consult the customer service CNRU
Quality is left to time to prove
Hotline:13003106660
Your location: Home Page > News > Valve knowledge

Hotline

13003106660

Why is the valve stem of a linear travel control valve thinner?

Author:Shanghai Lianggong ValvesTime:2025-06-18 03:06:18 Number of views

Abstract:

It involves a simple mechanical principle: sliding friction is large and rolling friction is small. The valve stem of the linear travel valve moves up and down. If the packing is slightly compressed,

Why is the valve stem of a linear travel control valve thinner?(图1)

It involves a simple mechanical principle: sliding friction is large and rolling friction is small. The valve stem of the linear travel valve moves up and down.

 If the packing is slightly compressed, it will wrap the valve stem very tightly, generating a relatively large backlash. For this reason, the valve stem is designed

 to be very thin, and the packing is often made of PTFE packing with a low coefficient of friction to reduce backlash. However, the problem that arises from this 

is that if the valve stem is too thin, it is prone to bending and the service life of the packing is also short. The best solution to this problem is to use the valve 

stem of a travel rotary valve, that is, an angular travel type control valve. Its valve stem is 2 to 3 times thicker than that of a linear travel valve stem, and it selects

 long-life graphite packing. The valve stem has good rigidity, and the packing has a long service life. As a result, the friction torque is smaller and the backlash is smaller.

【"Recommend】

Return Label: