Q:What are the meaning of the LH for the size of the valve stem of the electric gate valve?

Valve in general, into a positive and negative thread structure, to prevent thread loosening.

Q:What is the difference between the upper valve stem bearings of the thrust bearings?

You say this is also good, but the efficiency is not high, because this method of loading is more correct, the next is the plane of the main pressure on the end surface, the upper one is axial, the main subject to the left and right. Do you think the operation of the valve is not like this?!

Q:and the valve core hole is provided with a guide hole and a valve stem to match. How to ensure the concentricity and convenient disassembly and assembly

The matching of the valve core and the valve stem can only guarantee the maximum degree of concentricity by using the transition fit. Considering the need for loading and unloading, so I have the front, I said, only the use of higher precision gap fit".

Q:Liquefied petroleum gas cylinder angle valve stem leak how to do?

Beijing reader Wang Zhongtian asked the liquefied petroleum gas bottle corner bar to leak, can the gas bottle continue to use?. Make the following reply. Liquefied petroleum gas cylinders are to be tested for tightness only after they are fitted with a good angle valve. No leakage of any part of the cylinder (including angle valve stem). Because, as long as the leak, will make flammable liquefied petroleum gas diffuse in the room, to a certain concentration, in case of fire, will be burning explosion.

Q:What is the connection between the stem and the gate of the low-pressure gate valve?

The stem is threaded, i.e., the wire inserted on the wire rod and the gate, which is connected to a bolt structure and threads to operate the valve on and off,

Q:The ball valve in the valve is in what state is open

The valve in the factory depends on the order of the switch before the core and the orientation of the handle, the valve is most clockwise, counterclockwise is open.

Q:Is the strength of the ball valve stem and torque the same?

The question is not very clear, in the specifications, pressure rating unchanged, including the influence factors of the medium pressure, torque, temperature, medium viscosity and so on. So the torque change. Change the stem strength structural parameters, and the change of temperature change.

Q:Where is excavator, multiway valve stem processing?

Unfortunately, scanty domestic manufacturers are manufacturing excavator multi way valve stem, a little known is Nakagawa hydraulic.

Q:What is the seal between the valve stem and the valve cover?

Apply the molybdenum disulfide grease to rubber parts such as Y rubber ring. It can be sealed

Q:Ball valve stem 90 degrees milling flat, how to process?

Vertical milling or horizontal milling can be as good as vertical milling.One is clamped with the index head, and the other can be milled with the top. (graduated with a scale)