Accessories
Relief Valves
Relief valves can be used as primary pressure control devices or secondary (safety) pressure relief devices. Many systems also use two relief valves, one set as the primary pressure control and the other set as a secondary relief.
When used as a primary pressure control device, the relief valve sets and maintains consistent system pressure. Excess flow is bypassed back to the pump inlet, tank, or drain when the system reaches the set pressure point.
When configured as a secondary pressure control device, the relief valve provides pressure relief if the primary pressure control valve malfunctions. The secondary relief valve will open to relieve the system pressure, protecting the pump and system from damage caused by over-pressurization. A secondary relief valve can save costly pump and system damage, and more importantly, it’s an added safety feature to protect those working around the equipment.
- versions38
- pressure up to600 bar
- flow up to795 l/min
Relief Valves: all versions
Enter the values of your system. The list shows the versions rated for them – the closest match first. Use the plus to add an item to your request list.
No version covers these values. Check your entries – or ask us and we will find the right solution. Make an enquiry →
| Part no. | Material | Flow | Pressure range | Inlet | By-pass | Add to request list |
|---|---|---|---|---|---|---|
| 39585 | Stainless steel | 20 l/min | 125 bar | 1/4" BSP(F) | 1/4" BSP(F) | |
| 30960 | Brass | 23 l/min | 20–105 bar | 1/4" NPT(M) | 3/4" hose barb | |
| 33960 | Brass | 23 l/min | 20–105 bar | 3/8" NPT(M) | 3/4" hose barb | |
| 33960S | Stainless steel | 23 l/min | 20–105 bar | 3/8" NPT(M) | 3/4" hose barb | |
| 9960 | Stainless steel | 3.8–23 l/min | 20–105 bar | 1/4" NPT(M) | 3/4" hose barb | |
| 9960S | Stainless steel | 3.8–23 l/min | 20–105 bar | 1/4" NPT(M) | 3/4" hose barb | |
| 7501.100 | 316 stainless steel | 1.9–23 l/min | 7–140 bar | 3/8" NPT(M) | 3/8" NPT(F) | |
| 30961 | Brass | 23 l/min | 70–210 bar | 1/4" NPT(M) | 3/4" hose barb | |
| 9961 | Stainless steel | 3.8–23 l/min | 70–210 bar | 1/4" NPT(M) | 3/4" hose barb | |
| 9961S | Stainless steel | 3.8–23 l/min | 70–210 bar | 1/4" NPT(M) | 3/4" hose barb | |
| 33961 | Brass | 23 l/min | 70–275 bar | 1/4" NPT(M) | 3/4" hose barb | |
| 33961S | Stainless steel | 23 l/min | 70–275 bar | 1/4" NPT(M) | 3/4" hose barb | |
| 33962 | Brass | 23 l/min | 70–275 bar | 3/8" NPT(M) | 3/4" hose barb | |
| 33962S | Stainless steel | 23 l/min | 70–275 bar | 3/8" NPT(M) | 3/4" hose barb | |
| 9962 | Stainless steel | 3.8–23 l/min | 70–275 bar | 1/4" NPT(M) | 3/4" hose barb | |
| 9962S | Stainless steel | 3.8–23 l/min | 70–275 bar | 1/4" NPT(M) | 3/4" hose barb | |
| 39430 | Brass | 24 l/min | 100–140 bar | 3/8" NPT(M) | – | |
| 39389 | Brass | 24 l/min | 15–150 bar | 3/8" G(F) | 3/8" G(F) | |
| 39228 | Brass | 24 l/min | 22–220 bar | 3/8" G(F) | 3/8" G(F) | |
| 39229 | Brass | 24 l/min | 22–220 bar | 3/8" G(F) | 3/8" G(F) | |
| 39440 | Brass | 24 l/min | 130–240 bar | 3/8" NPT(M) | – | |
| 39580 | Brass | 24 l/min | 130–240 bar | 3/8" G(M) | – | |
| 7190 | Brass | 25 l/min | 35–350 bar | 3/8" BSP(F) | 3/8" BSP(F) | |
| 39735 | Brass | 40 l/min | 35–310 bar | 3/8" G(F) | 3/8" G(F) | |
| 7196 | Brass | 80 l/min | 50–500 bar | 1/2" BSP(F) | 3/8" BSP(F) | |
| 9940 | Brass | 0–95 l/min | 70–275 bar | 3/4" NPT(M) | 1" hose barb | |
| 9941 | Stainless steel | 0–95 l/min | 70–275 bar | 3/4" NPT(M) | 1" hose barb | |
| 1204073201006 | – | 100 l/min | 250–600 bar | 3/8" G(F) | 1/2" G(F) | |
| 890711 | 316 stainless steel | 0–189 l/min | 69–414 bar | 1" NPT(M) | 1" NPT(F) | |
| 32741 | Brass | 200 l/min | 20–200 bar | 3/4" NPT(F) | 1/2" NPT(F) | |
| 890721 | 316 stainless steel | 0–378 l/min | 7–41 bar | 2" NPT(M) | 2" NPT(F) | |
| 890710 | 316 stainless steel | 0–378 l/min | 21–103 bar | 1" NPT(M) | 1" NPT(F) | |
| 890714 | 316 stainless steel | 0–378 l/min | 21–103 bar | 1" NPT(M) | 1" NPT(F) | |
| 890715 | 316 stainless steel | 0–378 l/min | 69–552 bar | 2" NPT(M) | 2" NPT(F) | |
| 890712 | 316 stainless steel | 0–435 l/min | 35–207 bar | 1" NPT(M) | 1" NPT(F) | |
| 39625 | Brass | 450 l/min | 50–200 bar | 1 1/4" BSP(F) | 1 1/4" BSP(F) | |
| 890703 | 316 stainless steel | 0–511 l/min | 28–103 bar | 2" NPT(M) | 2" NPT(F) | |
| 890713 | 316 stainless steel | 0–795 l/min | 34–275 bar | 2" NPT(M) | 2" NPT(F) |
- The valve must suit the maximum flow and the working pressure of pump and system.
- A pressure relief valve is an additional safeguard; it does not replace a pressure regulator or unloader.
- (M) = male thread, (F) = female thread.