///On/off valve opens or closes slowly
On/off valve
On/off valve opens or closes slowly
A slow valve gives poor pierces, start marks and water on the part at the end of a cut.
Safety first: Switch off the pump, release all pressure (open the on/off valve or bleed-down valve) and lock out before you open any high-pressure part. Never put a hand or tool near a running jet.
1Check the causes, most likely first
0 of 3 checked
01Low air pressure or long air line
Most likely
Air cannot fill the actuator quickly.
How to check: Check air pressure at the valve; consider a quick exhaust valve.
| Photo | Art. no. | Description | Excl. VAT | |
|---|---|---|---|---|
 | 10275 | Air Nipple 6mm R1/8'', TJ06038/220
Fitting & adapterKMT, BFT, STM |
€ 15.60 | |
 | 10276 | Air Nipple 6mm R1/8'' 90 DEGR.
Fitting & adapterKMT |
€ 10.20 | |
 | 10277 | Air Quick Exhaust Valve, 1/8''
ValveKMT |
€ 75.60 | |
 | 10278 | Pneumatic Tube 6 x 4 (mm)
TubeKMT, BFT, Flow |
€ 4.68 | |
 | 10274 | Air Nipple 6 mm 90 DEGR.
Fitting & adapter |
€ 9.00 |
02Worn actuator seals
Possible
Leaking seals reduce force.
How to check: Rebuild the actuator.
03Tired springs
Possible
Springs close the valve slowly.
How to check: Compare spring length with new.
Related problems
General advice based on manufacturer manuals and service practice. Always follow the manual of your machine. Not sure? .