Vanaz V-4321I Slam Shut-Off Valve – Automatic Emergency Gas Isolation System

The Vanaz V-4321I Slam Shut-Off Valve is an essential safety component used in gas pressure reducing systems for LPG and Natural Gas applications.

It is installed immediately after the gas filter and before the regulator to continuously monitor downstream pressure conditions through an impulse line.

Under normal operating conditions, the valve remains open and allows smooth gas flow. However, if the outlet pressure exceeds the permissible limit, the valve instantly triggers and shuts off gas supply to protect the system from unsafe conditions.

Product Highlights

Instant Emergency Shut-Off

Rapidly closes gas flow when unsafe pressure levels are detected.

Installed After Filter Stage

Placed downstream of filter and upstream of regulator for accurate monitoring.

Impulse Line Pressure Sensing

Detects pressure changes and activates shut-off mechanism instantly.

Manual Reset Operation

Requires manual reopening after system correction and maintenance.

Durable Industrial Construction

Designed for reliable performance in demanding gas environments.

Key Benefits

Prevents System Overpressure

Stops gas flow before dangerous pressure levels can damage equipment.

Enhances Safety Protection

Acts as a critical emergency safeguard in gas distribution systems.

Protects Downstream Equipment

Prevents damage to regulators, pipelines, and appliances.

Reliable Automatic Response

Instant shut-off without external power or manual intervention.

Controlled Restart Function

Ensures system is only restarted after safe conditions are restored.

Working Principle

• Valve remains open during normal operation
• Monitors downstream pressure via impulse line
• Activates instantly when pressure exceeds set limit
• Completely shuts off gas flow to downstream system
• Must be manually reset after fault correction

Applications

• LPG gas distribution systems
• Natural gas pipeline networks
• Industrial burner systems
• Boiler and furnace installations
• Gas pressure regulation stations
• Commercial and industrial gas plants
• Safety-critical gas handling systems

Installation Position

The Vanaz V-4321I Slam Shut-Off Valve is installed:

• After the gas filter
• Before the pressure regulator

This ensures accurate pressure monitoring and fast system isolation.

Why Choose Vanaz V-4321I Slam Shut-Off Valve

The Vanaz V-4321I provides critical emergency protection by instantly stopping gas flow during overpressure situations.

Its fast response mechanism, reliable shut-off function, and manual reset safety design make it an essential component for high-risk gas systems.

Frequently Asked Questions

1. What is the main function of this valve?

It shuts off gas flow during overpressure conditions.

2. Where is it installed?

After the filter and before the regulator.

3. Does it operate automatically?

Yes, it activates automatically when pressure exceeds limits.

4. How is it reset?

It must be manually reset after correcting the fault.

5. Why is it important?

It prevents accidents, equipment damage, and gas system failures.