The HR Blowers UK Ltd’s range of blower relief valves are designed to protect the blower from system over pressure, venting the excess pressure to atmosphere to protect the blower. Over pressure in the system can cause the blower to overheat reducing the life of the components and in severe cases, complete failure. The valve connections can be manufactured to suit any Customer’s requirements.
Our new valve range has been redesigned to be compact and uses fewer components for improved reliability and cost efficiency. Blower protection valves are available with factory pre-set relief pressures and can also be set to your specific requirement. As our valves are manufactured here in the UK they are available from stock. The valves are manufactured from durable materials to ensure long life in the harshest conditions:
- Aluminium tube casing
- Brass valve bell
- Stainless steel spindle
- Zinc plated mild steel spring
Sizes and connections
|Nominal diameter||Connection*||Typical Capacity
m3/hr at 500mbg
m3/hr at 1000mbg
|80mm||3″ BSP||850||1100||HRBV, HR Size 10 & 11|
|100mm||4″ BSP||1300||1700||HR Size 12, 13, 20 & 21|
|125mm||5″ BSP||2000||2700||HR Size 22, 23 & 31|
|150mm||6″ BSP||2900||3800||HR Size 32, 33, 41, 42 & 43|
*Optional BS404: NP10 flange connection available to order.
Valves for HRBV (RBTM) truck mount blowers
We supply the 80 mm valve for our HRBV blowers with a factory pre-set relief pressure of up to 1240 mbar or to your specification. A 3″ to 2″ BSP adaptor may also be required for this application.
Valves for HR Rotary lobe blowers
The valve size required will vary with the blower size (see table above). Factory pre-set relief pressures of up to 1140 mbar are available, as required.
Vacuum relief valves
Coming soon: We will soon be able to supply relief valves for use with our high vacuum range of blowers.