Quotation for butt welded globe valve

Quotation for butt welded globe valve

The valve body material is made of high-quality carbon steel stainless steel (1Cr18Ni9Ti) or heat-resistant alloy steel forged, and the sealing surface is made of hard alloy overlay welding

J61Y-320P J63-P54-250V J23W-320P J21Y-320

公称压力： PN2.5 PN4 PN6.4 PN16 PN32 PN60Mpa
Nominal diameter: DN5 to DN25

Applicable media: various non corrosive or corrosive media such as supercritical steam, oil, water, gas, etc
Applicable temperature: -20 ℃~+440 ℃~70 ℃~240 ℃ ≤ 540 ℃ ≤ 570 ℃, etc
Manufacturing materials: 12Cr1MoG, 1Cr18Ni9Ti, 304, 316, 316L, F22 F91 F92 F316H, etc

Product Features

1. The structure is simple, and manufacturing and maintenance are relatively convenient.

2. Small work schedule and short opening and closing time.

3. Good sealing performance, low friction between sealing surfaces, and long service life.

4. Large, requiring a significant amount of force to open and close.

5. Not suitable for media with particles, high viscosity, and ease of handling.

6. The adjustment performance is good.

Quotation for butt welded globe valve

When injecting fat, the issue of fat injection effect is often overlooked. The pressure, grease injection amount, and switch position are all normal during the grease injection operation. But to ensure the grease injection effect of the butt welding globe valve, sometimes it is necessary to open or close the butt welding globe valve, check the lubrication effect, and confirm that the surface lubrication of the ball or gate of the butt welding globe valve is uniform.

When injecting grease, attention should be paid to valve body drainage and plug pressure relief. After the pressure test of the butt welding globe valve, the gas and moisture inside the sealed chamber of the valve are pressurized due to the increase in ambient temperature. When injecting grease, it is necessary to first discharge and release the pressure to facilitate the smooth progress of the grease injection work. After grease injection, the air and moisture inside the sealed chamber are fully displaced. Timely release of valve chamber pressure also ensures the safe use of butt welded globe valves. After the grease injection is completed, be sure to tighten the drain and pressure relief plugs to prevent accidents from occurring

During maintenance, attention should also be paid to the problem of water ingress in the electric head and its transmission mechanism. Especially rainwater that seeps in during the rainy season. One is to rust the transmission mechanism or transmission shaft sleeve, and the other is to freeze in winter. Excessive torque during electric valve operation can damage transmission components, causing the motor to be unloaded or the over torque protection to trip and prevent electric operation. The transmission components are damaged and manual operation is not possible. After the over torque protection action, manual operation is also unable to switch on and off. If forced, it will damage the internal alloy components.

The selection principle is:

1. Globe valves should be used on pipelines or devices for high-temperature and high-pressure media. High temperature and high-pressure pipelines in thermal power plants, nuclear power plants, and petrochemical systems.

2. On pipelines with lax flow resistance requirements. Places where pressure loss is not given much consideration. 3. Small valves can be selected from needle valves, instrument valves, sampling valves, pressure gauge valves, etc.