Pneumatic Shut-off Globe Valve

Application Scenarios
Petrochemical Industry: Emergency shut-off for liquefied gas stations (e.g., QDQ421F-16P).
Power & Metallurgy: High-temperature steam pipelines (e.g., J641H-16C, withstands 550°C).
Environmental Protection & Water Treatment: Corrosive media (e.g., 304 stainless steel wafer valves).

Detail

Parameters

1. Definition and Function

The pneumatic shut-off globe valve is a compressed air-driven valve that combines rapid shut-off and flow regulation capabilities, suitable for industrial scenarios requiring precise control or emergency isolation. Its core functions include:

Shut-off of media: Fully open/fully closed operation with response times under 0.1 seconds.

‌Flow Regulation: Certain models support linear percentage flow control (e.g., ZHJP series).

2. ‌Primary Types and Characteristics‌

(1)‌By Structural Classification‌

‌Single-Seat/Double-Seat Valves:

Single-seat valves (e.g., J641H) offer superior sealing performance for high differential pressure applications.

Double-seat valves (e.g., Q641F) feature balanced force design for high-flow requirements.

Ball Valve and Globe Valve Combination:

Ball valves (e.g., QDQ421F) enable rapid shut-off, while globe valves (e.g., J641H) facilitate precise regulation.

(2) Classification by Function

Standard Type: Conventional opening/closing with 1-3 second response time.

Emergency Shut-off Type: Interfaces with fire protection/leak detection systems for closure within 0.1 seconds.