Festo VZXA-***-M Series, Instructions For Use

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11 Maintenance
Danger
Risk of injury from touching hot surfaces!
Valve and actuator can become hot at high temperature of medium. Severe
burns are possible.
Allow the angle seat valve to cool off before working on it.
Check product regularly from the outside for leakage.
Check function of the product regularly.
Clean product regularly with commercial cleaners.
12 Conversion
Danger
Risk of injury from items flying around!
If they are not secured well enough, parts under pressure can fly around and
injure people.
Before exchanging wearing parts, depressurise the valve and piping.
1
2
1
Spanner flats for counter holding
2
SW46 interface nut
Fig. 7
12.1 Remove the actuator from the valve housing – in built-in state
The actuator can be removed from the valve housing without having to remove
the valve from the piping.
Valves with NO control function
1. Depressurise the valve and piping and allow them to cool.
2. Secure the actuator from falling or slipping with appropriate means of securing.
3. Exhausting the actuator.
è
Actuator rod is retracted
4. Unscrew interface nut (
è
Fig. 7,
2
).
5. Pressurise connection (2).
è
Actuator rod is extended
6. Remove actuator from the valve housing.
7. Switch off operating pressure.
8. Depressurise the connection line of the operating medium.
9. Disconnect connection lines of the operating medium.
Valves with NC control function
1. Depressurise the valve and piping and allow them to cool.
2. Secure the actuator from falling or slipping with appropriate means of securing.
3. Pressurise connection (2).
è
Actuator rod is retracted.
4. Unscrew interface nut (
è
Fig. 7,
2
).
5. Exhausting the actuator.
è
Actuator rod is extended
6. Disconnect the operating medium connection line
7. Remove actuator from the valve housing.
12.2 Remove actuator from the valve housing – in disassembled state
1. Retract actuator rod.
– For valves with NO control function: exhaust the actuator.
– For valves with NC control function: pressurise connection (2).
2. Unscrew interface nut (
è
Fig. 7,
2
).
3. Extend actuator rod.
– For valves with NO control function: pressurise connection (2).
– For valves with NC control function: exhaust actuator.
4. Remove actuator from the valve housing.
5. Switch off operating pressure.
12.3 Mount actuator onto the valve housing
Valves with NO control function
1. Connect the operating medium connection line.
– Pneumatic connection (2): operating medium
– Pneumatic connection (4): exhaust port
2. Slowly apply pressure to the actuator
è
Actuator rod is extended.
3. Place actuator onto valve housing.
4. Tighten interface nut (
è
Fig. 7,
2
) until noticeable resistance is felt and then
continue to turn it approx. ¼ turn.
5. Switch off operating pressure.
è
Actuator rod is retracted.
6. Tighten interface nut (
è
Fig. 7,
2
).
– Tightening torque: 50 Nm.
Valves with NC control function
In a pressureless state, the actuator rod is extended.
1. Place actuator onto valve housing.
2. Tighten interface nut (
è
Fig. 7,
2
) until noticeable resistance is felt and then
continue to turn it approx. ¼ turn.
3. Connect lines of the operating medium.
– Pneumatic connection (2): operating medium
– Pneumatic connection (4): exhaust port
4. Slowly apply pressure to the actuator.
è
Actuator rod is retracted.
5. Tighten interface nut (
è
Fig. 7,
2
).
– Tightening torque: 50 Nm.
12.4 Turn actuator
1. Retract actuator rod.
– For valves with NC control function: pressurise connection (2).
– For valves with NO control function: exhaust actuator.
2. Unscrew interface nut (
è
Fig. 7,
2
).
3. Turn actuator into the desired position.
4. Tighten interface nut (
è
Fig. 7,
2
).
– Tightening torque: 50 Nm.
13 Removal
Danger
Risk of injury from touching hot surfaces!
Valve and actuator can become hot at high temperature of medium. Severe
burns are possible.
Allow the angle seat valve to cool off before working on it.
Danger
Risk of injury due to movement of pressurised parts!
The angle seat valve can switch if there is a drop in pressure. Limbs can be cut or
severed.
Before removal, move the valve to the closed position.
Before removal, depressurise the valve and the piping.
Warning
Risk of injury due to slipping or falling objects!
The angle seat valve can weigh up to 11.5 kg, depending on the product version.
Body parts can be crushed.
Angle seat valve with appropriate means of securing against falling or
slipping.
1. Depressurise the piping and the operating medium connection line. Allow
the valve and piping to cool.
2. Empty the piping and valve completely.
Make sure no one is located in front of the outlet opening.
Catch discharging media in a suitable container.
3. Disconnect connection lines of the operating medium from the valve.
4. Loosen piping connectors.
5. Remove angle seat valve.
14 Disposal
Observe the local regulations for environmentally friendly disposal.
Dispose of the product in an environmentally friendly manner. When doing this,
also take residual media into account (potential recycling of hazardous waste).