Features

After the process piping system is installed, air or steam purging can be used, depending on the working medium’s operating conditions and the degree of contamination on the piping’s inner surface. Air purging should utilize the production unit’s large compressor, or intermittently purging using a large container within the unit. The purging pressure must not exceed the design pressure of the container and piping, and the flow rate should not be less than 20 m/s. Steam purging should be performed with a high flow rate of steam, at a flow rate of no less than 30 m/s.

Structural features

1. The valve adopts a mode gate valve, and the gate and valve body guide device are welded with hard alloy to ensure that the valve can be opened frequently and smoothly.

2. The sealing surface of the valve disc and valve seat adopts the latest surfacing material, which is wear-resistant and has strong anti-scratch performance.

3. The electric valve stem adopts double-headed or triple-headed threads to ensure that the valve opens quickly.

Product standards

1. Design standards: According to DL/T531-1994, JB/T 3595-2002, NB/T 47044-2014

2. Design standard: ASME B16.34-2013

Nominal pressure: PN16-PN420 (150LB-2500LB)

Nominal diameter: DN50-DN500 (2-20′)

Main material: 1. WCB, ZG20CrMo, Cr5Mo, ZG20CrMoV, ZG15Cr1MoV

2、25#、12Cr1MoV

3. ASTM A216 WCB、ASTM A217 WC6、ASTM A217 WC9、 ASTM A217 C12A

4. ASTM A105、ASTM A182 F11. ASTM A182 F22、ASTM A182 F91、 ASTM A192 F92

Operating temperature: 1. WCB: -29°C~425°C

2. Alloy steel: -29°C~540°C. -29°C-570°C

3. F91:-29℃-610℃℃

Applicable medium: water, steam, etc.

Connection method: welding

Transmission mode: electric, pneumatic, hydraulic