Accessories
Unloader Valve
A pressure-sensitive unloader is used as a primary pressure control device to set and maintain consistent system pressure while providing an energy and system savings feature that allows the pump to run at low pressure when the downstream flow shuts off.
An unloader contains a check valve that traps pressure between the closed downstream device (shut-off gun) and the unloader, causing an internal piston to open, allowing the pump to unload at low pressure. When the shut-off gun is opened back up, the system will return to operating pressure.
- versions36
- pressure up to414 bar
- flow up to450 l/min
Unloader Valve: 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 | Discharge | By-pass | Add to request list |
|---|---|---|---|---|---|---|---|
| 7600S | Brass | 7.6–19 l/min | 48–241 bar | 3/8" NPT(M) | 3/8" NPT(M) | 3/8" NPT(F) | |
| 7500S | Brass | 1.89–23 l/min | 6.9–138 bar | 3/8" NPT(M) | 3/8" NPT(M) | 3/8" NPT(F) | |
| 107667 | Brass | 1.9–23 l/min | 7–140 bar | 3/8" NPT(M) | 3/8" NPT(M) | 3/8" NPT(F) | |
| 7501 | 316 stainless steel | 1.9–23 l/min | 7–140 bar | 3/8" NPT(M) | 3/8" NPT(M) | 3/8" NPT(F) | |
| 7850 | Brass | 1.9–23 l/min | 6.9–275 bar | 1/2" NPT(F) | 3/8" NPT(M) | built-in | |
| 7670 | Brass | 9.5–30 l/min | 10–120 bar | 3/8" NPT(F) | 3/8" NPT(F) | 3/8" NPT(F) | |
| 709626 | Stainless steel | 30 l/min | 0–150 bar | 3/8" Rp | 3/8" Rp | 3/8" Rp | |
| 39439.ENPT | Brass | 10–30 l/min | 22–220 bar | 3/8" BSP(F) | 3/8" BSP(F) | built-in | |
| 7620 | Brass | 1.9–30 l/min | 6.9–220 bar | 3/8" BSP(M) | 3/8" BSP(F) | 3/8" BSP(F) | |
| 709627 | Stainless steel | 30 l/min | 0–250 bar | 3/8" Rp | 3/8" Rp | 3/8" Rp | |
| 7690 | Brass | 9.5–30 l/min | 70–280 bar | 3/8" NPT(F) | 3/8" NPT(F) | 3/8" NPT(F) | |
| 7691 | Brass | 9.5–30 l/min | 70–280 bar | 3/8" NPT(F) | 3/8" NPT(F) | 3/8" NPT(F) | |
| 30718 | Brass | 35 l/min | 90–250 bar | 3/8" Rp | 3/8" Rp | 1/4" Rp | |
| 30718T140 | Brass | 40 l/min | 14–140 bar | 3/8" G(F) | 3/8" G(F) | 3/8" G(F) | |
| 7693 | Brass | 9.5–40 l/min | 16–160 bar | 3/8" NPT(F) | 3/8" NPT(F) | 3/8" NPT(F) | |
| 30718T | Brass | 40 l/min | 28–280 bar | 3/8" G(F) | 3/8" G(F) | 3/8" G(F) | |
| 39718 | Brass | 40 l/min | 28–280 bar | 3/8" BSP(F) | 3/8" BSP(F) | 3/8" BSP(F) | |
| 7694 | Brass | 9.5–40 l/min | 28–280 bar | 3/8" NPT(F) | 3/8" NPT(F) | 3/8" NPT(F) | |
| 7630 | Brass | 7.6–40 l/min | 35–350 bar | 3/8" BSP(M) | 3/8" BSP(F) | 1/2" BSP(F) | |
| 7630.PRE | Brass | 40 l/min | 35–350 bar | 3/8" BSP(M) | 3/8" BSP(F) | 1/2" BSP(F) | |
| 709628 | Stainless steel | 50 l/min | 0–250 bar | 1/2" BSP(F) | 1/2" BSP(F) | 1/2" BSP(F) | |
| 32318 | Brass | 30–80 l/min | 15–150 bar | 1/2" BSP(F) | 1/2" BSP(F) | 1/2" BSP(F) | |
| 39226 | Stainless steel | 80 l/min | 15–150 bar | 1/2" BSP(F) | 1/2" BSP(F) | 1/2" BSP(F) | |
| 7531 | Stainless steel | 3.8–80 l/min | 27.5–152 bar | 1/2" NPT(F) | 1/2" NPT(F) | 1/2" NPT(F) | |
| 39635.R | Brass | 80 l/min | 28–160 bar | 1/2" G(F) | 1/2" G(F) | 1/2" G(F) | |
| 7537 | Brass | 3.8–80 l/min | 15.8–180 bar | 1/2" NPT(F) | 1/2" NPT(F) | 1/2" NPT(F) | |
| 7533 | Stainless steel | 3.8–80 l/min | 55–275 bar | 1/2" NPT(F) | 1/2" NPT(F) | 1/2" NPT(F) | |
| 7542 | Brass | 3.8–80 l/min | 55–275 bar | 1/2" NPT(F) | 1/2" NPT(F) | 1/2" NPT(F) | |
| 39227 | 316 stainless steel | 20–80 l/min | 28–280 bar | 1/2" BSP(F) | 1/2" BSP(F) | 1/2" BSP(F) | |
| 39640.R | Brass | 80 l/min | 28–280 bar | 1/2" G(F) | 1/2" G(F) | 1/2" G(F) | |
| 39896 | Brass | 20–80 l/min | 55–280 bar | 1/2" G(F) | 1/2" G(F) | 1/2" G(F) | |
| 32319 | Stainless steel | 80 l/min | 40–400 bar | 1/2" BSP(F) | 1/2" BSP(F) | 1/2" BSP(F) | |
| 7536 | Stainless steel | 3.8–80 l/min | 207–414 bar | 1/2" NPT(F) | 1/2" NPT(F) | 1/2" NPT(F) | |
| 7590 | Brass | 38–200 l/min | 15–150 bar | 1" NPT(F) | 1" NPT(F) | 1" NPT(F) | |
| 7592 | Brass | 38–200 l/min | 31–172 bar | 1" NPT(F) | 1" NPT(F) | 1" NPT(F) | |
| 32516 | Brass | 450 l/min | 20–200 bar | 1 1/4" BSP(F) | 1 1/4" BSP(F) | 1 1/2" BSP(F) |
- The flow and pressure of your system must lie within the range of the valve: below the minimum flow the valve starts to cycle, above the maximum it wears prematurely.
- (M) = male thread, (F) = female thread.