Product Details
Product Introduction:
Our company manufactures differential pressure relief valves—also known as pressure‑relief valves or automatic differential pressure regulators—which are specialized devices installed in building smoke control and exhaust systems at locations such as stairwell anterooms, shared anterooms, and fire‑elevator lobbies. When the pressurization system is operating and the pressure inside the anteroom exceeds the set threshold, the valve automatically opens to vent excess pressure, maintaining the indoor pressure within a safe range. This prevents excessively high pressures from impeding the proper opening of fire doors and ensures the safe evacuation of occupants.
General technical parameters (taking a mainstream mechanical differential pressure relief valve as an example):
| Parameter Item |
Specification Details |
| Product Name |
Relief valve (pressure relief valve, differential pressure automatic regulating valve) |
| Nominal size |
Common specifications: 200×200 mm, 300×300 mm, 400×400 mm (custom non-standard sizes available) |
| Enable differential pressure |
25–30 Pa (adjustable; factory default) |
| Working pressure differential range |
Maintain the pressure in the antechamber at 40–50 Pa (in compliance with fire safety regulations) |
| Adjustment method |
Balance weight / Spring adjustment allows on-site setting of the opening pressure. |
| Valve body material |
Galvanized steel with powder coating (standard), featuring an electrostatically applied powder finish for rust resistance and corrosion protection. |
| Valve type |
Single-leaf flat-type pressure relief valve, with automatic reset. |
| Installation method |
Embedded wall / Ceiling installation, compatible with pressure-relief piping |
| Applicable Scenarios |
Pressure relief of the pressurized ventilation systems in stairwell anterooms, shared anterooms, and fire elevator anterooms. |
| Applicable medium |
Ordinary air, medium temperature ≤60℃ |
| Work environment |
-10℃ to +60℃, relative humidity ≤95% (no condensation) |
Applicable Scenarios and Selection Recommendations:
Core use cases:
1. Pressure relief of the pressurization ventilation system in the antechamber, shared antechamber, and fire elevator antechamber of high-rise buildings.
2. Pressure regulation of the positive-pressure ventilation system for smoke-control stairwells in underground buildings
3. Fire and smoke control systems in high-occupancy facilities such as shopping malls, office buildings, and hospitals
Key considerations for selection:
1. Selection based on relief airflow rate: Determine the appropriate overpressure valve size according to the designed supply airflow and relief airflow for the antechamber, ensuring that the relief airflow meets the system’s requirements.
2. Selection based on opening pressure: According to code requirements, the differential pressure in the antechamber should be maintained at 25–30 Pa during opening and 40–50 Pa during operation; models with adjustable pressure are preferred.
3. Installation requirements: The device shall be mounted on the wall between the antechamber and the corridor, at a height of 0.3 to 1.5 meters above the floor, to facilitate adjustment and maintenance.
4. Regulatory Compliance: Products must comply with national fire safety standards to ensure they meet the pressure control requirements of the smoke control and exhaust system.
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Mobile phone:+86-188-6602-0062
Email:sddljnhb@163.com
Website:http://www.sddljnhb.com
Address: No. 5166, Tianqu East Road, Economic Development Zone, Dezhou City, Shandong Province
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