High Static Pressure Flameless Vent
Product Model: ZD-FV20 (HSP Flameless Vent)
Type: Flameless Venting Device for Pressurized Vessels
Material: Heavy-gauge housing. High-integrity, reverse-acting metal burst panel (e.g., scored, knife-blade). Reinforced quenching matrix.
Key Feature: Incorporates a burst panel designed to withstand significant positive or negative operating pressures (high Pstat) while maintaining sensitivity to activate during a fast-rising explosion event.
Overview
Protecting vessels that operate under pressure requires a vent that remains securely sealed during normal operation but opens instantly for an explosion. The HSP Flameless Vent uses a mechanically held, reverse-acting burst disk that can withstand high cyclic pressures and vacuum. This ensures process integrity is maintained while providing reliable explosion protection when needed.
Features & Benefits
Seals at Operating Pressure: Prevents product loss, maintains process conditions, and avoids environmental emissions during normal operation.
Reliable Activation: The burst panel is precisely scored or designed to open fully and predictably at its set pressure (Pstat) under explosion conditions.
Extended Service Life: Robust construction suits demanding process environments with pressure/vacuum cycles.
Comprehensive Solution: Combines pressure sealing with flameless venting in one unit.
How It Works
Under normal operation, the burst panel (e.g., a scored metal disk) acts as a pressure-tight seal. During an explosion, the rapid pressure rise causes the panel to open along its pre-defined score lines, folding back completely with minimal resistance. The explosion is then quenched by the mesh matrix as in a standard flameless vent.
Specifications (Descriptive)
Defined by its Pstat value (static activation pressure), which must be carefully selected to be above the maximum normal operating pressure (MAWP) but below the vessel's design pressure. Vacuum rating is also specified if applicable. Sizes are typically from DN 200 to DN 500.
Q&A
Q: How is the Pstat value determined?
A: It is a critical safety parameter. It is selected based on the vessel's MAWP, required safety margin, and the explosion characteristics of the material. It must be low enough to ensure venting occurs before the vessel is overpressurized. Engineering analysis is essential.
Q: Does the burst disk require special handling?
A: Yes. Reverse-acting scored disks are sensitive to scratching or denting, which can alter their burst pressure. They must be handled, installed, and transported with care according to the manufacturer's instructions.
