Gas-tight isolation for critical environments
DSR/DSS Gas-Tight Isolation Dampers are heavy-duty stainless steel shut-off dampers
designed to provide positive containment in critical ventilation systems.
In the standard configuration, the damper achieves gas-tight shut-off with bubble-tight sealing when closed against the rated differential pressure. Performance is verified through pressure decay testing in line with DSR/DSS Factory Acceptance Test (FAT) procedures.
Ideal for high-performance and safety-critical applications, DSR/DSS dampers are suited to laboratory exhaust systems, pharmaceutical facilities, clean rooms, hazardous gas environments, and mission-critical HVAC installations.
Configurations available
- Circular
- Square
- Rectangular
Sizes
DSR-Circular
DSS-Square/Rectangular
- Minimum 150 x 150mm
- Maximum 1100 x 1150mm
For larger sizes speak to your Price Holyoake representative.
True gas-tight (bubble-tight) isolation
Provides bubble-tight shut-off performance up to 7.5 kPa differential pressure when fully closed.
Controlled dynamic operation
Designed for safe opening and closing at system pressures up to 4.5 kPa differential pressure and air velocities up to 20 m/s.
High-integrity shaft sealing
Compression-type PTFE (teflon) packing gland ensures zero external (ambient) leakage up to 10 kPa.
Low operating torque design
Perimeter blade seal configuration (without blade stop seal) reduces friction and actuator torque requirements.
Low pressure loss
Unobstructed blade profile in the open position minimises airflow resistance.
Elevated temperature operation
Rated for continuous operation at temperatures up to 150°C.
Fully welded stainless-steel construction
Heavy-gauge frame and reinforced double-skin blade ensure structural stability under high differential pressure.
Optional
- Loose gaskets
- Loose flanges
- Viton blade seals
- Multiple finish options
