Magnetic Gate Valve

Description

Data Sheet

-Full port, 1/4″-4″(DN6-DN100)
-W.P.:1000WOG(PN63)
-W.P.:-20℃-180℃
-Thread type: ASME B1.20. 1 (NPT),
NIN 259/DIN 2999, BS 21,
ISO 288-1, ISO 7-1

Magnetic gate valve is a special type of gate valve that utilizes magnetic force to control the opening and closing of the valve. It employs magnetic materials and magnetic fields to operate the valve.

Here are some characteristics and working principles of magnetic gate valves:

Structure: The structure of a magnetic gate valve is similar to traditional gate valves, including a valve body, valve bonnet, valve disc (gate), and valve stem. However, magnetic gate valves use magnetic materials on the valve disc and valve stem and generate a magnetic field between the valve body and bonnet.

Magnetic materials and magnetic field: The magnetic materials on the valve disc and valve stem are typically permanent magnets or materials with magnetic properties. The magnetic field generated between the valve body and bonnet is achieved by activating an electromagnet or magnetic coil. When the electromagnet is energized or the magnetic coil is activated, the magnetic field exerts force on the valve disc and valve stem, causing them to move.

Control method: The opening and closing of magnetic gate valves can be achieved by controlling the current to the electromagnet or magnetic coil. When current flows through the electromagnet or magnetic coil, the generated magnetic field attracts or repels the magnetic materials on the valve disc and valve stem, thereby opening or closing the valve.

Contactless operation: The magnetic operation of the magnetic gate valve eliminates direct mechanical contact between the valve disc, valve stem, and the valve body, reducing wear and friction, and improving the valve’s lifespan and reliability.

Application areas: Magnetic gate valves are commonly used in special applications, such as when the liquid contains solid particles or when the medium has high viscosity. The magnetic operation method helps to reduce valve clogging and blockage.

The sealing performance of a soft magnetic gate valve is an important feature to ensure effective prevention of media leakage when the valve is in the closed position.

Here are some considerations regarding sealing in soft magnetic gate valves:

Valve disc and seat sealing: The tight fit between the valve disc and seat is crucial for achieving sealing performance in soft magnetic gate valves. Soft magnetic materials typically possess high magnetic permeability and low coercivity, allowing the valve disc to tightly fit against the seat. In the closed position, the metal-to-metal or metal-to-soft seal contact between the valve disc and seat ensures good sealing performance.

Valve stem sealing: Good sealing between the valve stem and bonnet is also required in soft magnetic gate valves. Typically, sealing devices such as seals or packing are used to prevent media leakage. The selection and design of the sealing device should be able to withstand the pressure and temperature conditions of operation while ensuring effective sealing performance.

Sealing performance testing: Sealing performance tests are typically conducted before manufacturing and during the use of soft magnetic gate valves to ensure valve sealing. Common testing methods include leak testing and pressure testing. These tests can assess the sealing performance of the valve under different pressure and temperature conditions and ensure compliance with relevant standards and specifications.

Sealing material selection: The choice of appropriate sealing materials is crucial for the sealing performance of soft magnetic gate valves. The sealing materials should be able to withstand the nature, temperature, and pressure of the media and possess good resistance to wear and chemical corrosion. Common sealing materials include rubber, polytetrafluoroethylene (PTFE), and others.