Product- Hawle Schweiz Armaturen AG

1470100000 Pressure surge drain valve DN 100 PN 16

1: Main valve
2: Ball valves (A, B, C, D)
3: Filter
4: Orifice
5: Throttle check valve
6: Control valve DAV
7: Control valve DRV with ZK
8: Optical position indicator (optional: Electrical position indicator, opening limiter)
9: Pressure gauge with ball valve

Product attributes

The main valve is a hydraulically operated diaphragm valve; the operating energy is provided by the medium itself.
Most valve types operate purely hydraulically, without any external energy supply.

Application in drinking water (other media on request)
Reduction of pressure peaks in the event of a power failure during pump operation

The surge relief valve is installed near a pump at the outlet of a pressure pipeline. During controlled start-up and shutdown of pumping systems, no harmful pressure surges occur. In the event of a power failure, however, the abrupt stopping of the pump can cause dangerous pressure surges in the system, which may result in severe damage to the installation.
The surge relief valve reduces these pressure surges by opening during the low-pressure wave, ensuring that it is fully open when the high-pressure wave returns, allowing the excess pressure to be discharged to the atmosphere.

To calculate the dimensions of the valve please refer to the following information:
- Static pressure upstream of the valve when the pump is switched off
- Pump operating pressure
- Flow rates
- Water hammer calculations
- Existing pipe diameters and pipe lengths

Shut-off gate valves must be installed on both sides of the valve, and a strainer must be installed on the valve inlet side. Depending on the installation conditions, a dismantling joint must also be provided.

Dimension H1 increases by 110 mm up to DN 100 and by 130 mm for DN 125 to DN 300 when equipped with an electrical position indicator and an opening limiter.