Pneumatic Diaphragm-Piston Shutoff Valve
Pneumatically actuated quick-action shutoff valve with multi-spring diaphragm and piston actuator for emergency isolation.
Inquire NowProduct Overview
The pneumatic diaphragm-piston shutoff valve combines a multi-spring actuator with a robust globe-style valve body. When air supply is lost, the springs automatically drive the valve to its safe (closed or open) position, ensuring fail-safe operation in critical service.
Compatible with ESD / SIS systems and solenoid valve manifolds, the valve achieves rapid closure within 0.5 to 2 seconds and meets SIL2 / SIL3 functional safety requirements for emergency shutoff service.
Key Features
- Fail-Safe Action: Spring-return design drives valve to safe position on air loss
- Fast Closure: 0.5 - 2 second closure for SIS / ESD emergency service
- Multi-Spring Drive: Multi-spring diaphragm actuator with high thrust output
- Inline Diagnostics: Partial stroke testing (PST) compatible for SIL validation
- Tight Shutoff: Metal-to-metal or soft seat per ANSI Class IV / V
Technical Highlights
Typical Applications
Burner management, ESD / SIS loops, oil & gas ESDVs, chemical emergency isolation, boiler feedwater isolation.
产品概述
气动薄膜活塞切断阀采用多弹簧执行器配合坚固的截止阀阀体。当气源失压时，弹簧自动驱动阀门到安全位（关闭或打开），保证故障安全运行。
兼容ESD/SIS系统和电磁阀组，关闭时间0.5~2秒，满足SIL2/SIL3功能安全要求，是紧急切断应用的关键设备。
核心特点
- 故障安全： 弹簧复位设计，气源失压时阀门自动回安全位
- 快速关闭： 0.5~2秒关闭时间，适合SIS/ESD紧急切断
- 多弹簧驱动： 多弹簧薄膜执行器，输出推力大
- 在线诊断： 支持部分行程测试（PST），便于SIL验证
- 紧密关断： 金属或软阀座，泄漏等级ANSI IV/V级
技术参数
典型应用
燃烧管理、ESD/SIS回路、油气紧急切断阀、化工紧急隔离、锅炉给水隔离。