3.
6.1
Cleaning the valve
•
Remove all transport packaging. The material used in the packaging has been
specifically chosen for its recyclability (exception: oil-impregnated paper =
residual waste).
Traces of residual grease may be evident on the product due to the production
process.
•
Clean the valve immediately before mounting.
6.2
Mounting the valve
WARNING
Risk of injury due to slipping or falling objects.
The valve can weigh up to 11.5 kg, depending on the product version. Body parts
can be crushed. In overhead installations, the result can be serious head injuries.
• Secure the valve from falling or slipping with appropriate means of securing.
1. Bring the valve into its mounting position.
–
Note the flow direction. The permissible flow direction is marked on the
angle seat fitting by an arrow
2. Clamp or weld piping to the angle seat fitting, depending on the connection
type.
3. Connect the operating medium connection line.
–
Pneumatic port (2): operating medium
–
Pneumatic port (4): exhaust port
4. Mount the silencer in the exhaust port or use a tubing connection for guided
exhaust air.
7
Commissioning
WARNING
Risk of injury from manipulation in the operating area of the angle seat valve.
Limbs can be cut or severed.
• Operate the angle seat valve only if it is fully mounted.
Requirements
–
The valve is fully mounted and connected.
7.1
Checking operating conditions
1. Check operating conditions and critical limits
2. Check connection points for tightness.
3. Check compatibility of the devices in the system for maximum pressure (con-
sider pressure peaks). If necessary, adjust the application parameters.
7.2
Commissioning the valve
1. Supply medium.
2. Slowly apply operating pressure to the valve. The operating pressure required
for reliable switching of the valve depends on the pressure of the medium .
3. Test the function and check the direction of the individual pneumatic actua-
tors.
8
Operation
WARNING
Risk of injury from touching hot surfaces.
Angle seat fitting and actuator can become hot if the temperature of medium is
high. Severe burns are possible.
• Do not touch the angle seat valve during operation or immediately afterward.
•
Comply with operating conditions.
•
Comply with maintenance conditions
After longer idle times:
•
Actuate the valve several times and check that it functions correctly.
9
Maintenance
WARNING
Risk of injury from touching hot surfaces.
Angle seat fitting and actuator can become hot if the temperature of medium is
high. Severe burns are possible.
• Allow the angle seat valve to cool off before working on it.
•
Check product regularly from the outside for leakage and function.
•
Check function of the product regularly.
•
Clean product regularly with commercial cleaning agents.
10
Malfunctions
Fault description
Cause
Remedy
Valve does not close or
closes too slowly.
VZXA-B: medium pressure is too
high or operating pressure too low.
Set required differential pres-
sure or adjust operating pres-
sure
Medium contains too many or too
large contaminants.
Comply with operating condi-
tions.
Valve does not open or
opens too slowly.
VZXA-A: operating pressure is too
low or medium pressure too low.
Adjust operating pressure or
medium pressure.
VZXA-B: operating pressure is too
low.
Adjust operating pressure.
Fault description
Cause
Remedy
Medium leaks out of
leakage hole.
Seal cartridge is faulty.
Replace the seal cartridge
è
Spare parts documenta-
tion.
Medium cannot be shut off.
Seat seal is defective.
Replace seat seal
è
Spare
parts documentation.
Tab. 3
11
Modification
DANGER
Risk of injury from flying objects.
Unsecured parts under pressure can fly around and injure people.
• Before replacing wearing parts, depressurise the valve and piping.
1
2
Fig.2
1
Interface screw SW46
2
Spanner flat for counter holding
11.1
Demounting the drive from the angle seat fitting - in the installed state
The drive can be removed from the angle seat fitting without removing the valve
from the piping system.
1. Depressurise the piping and allow valve to cool to room temperature.
2. Secure the drive with suitable equipment to prevent it from falling or slipping.
Extend actuator stem.
–
With valves with N/O control function: pressurise port (2) (0.3 MPa; 3 bar;
43.5 psi).
–
For valves with N/C control function: exhaust drive.
4. Loosen interface screw [1].
5. Remove drive from the angle seat fitting.
6. Shut off operating pressure.
11.2
Demounting the drive from the angle seat fitting - in the demounted
state
1. Extend actuator stem.
–
With valves with N/O control function: pressurise port (2) (0.3 MPa; 3 bar;
43.5 psi).
–
For valves with N/C control function: exhaust drive.
2. Loosen interface screw [1].
3. Remove drive from the angle seat fitting.
4. Shut off operating pressure.
11.3
Mounting drive on the angle seat fitting
1. Extend actuator stem.
–
For valves with N/O control function: pressurise port (2) slowly (0.3 MPa;
3 bar; 43.5 psi).
–
For valves with N/C control function: exhaust drive.
2. Push the spindle of the angle seat fitting completely into the angle seat
fitting.
3. Place drive on angle seat fitting.
4. Tighten interface screw [1].
–
Tightening torque: 50 Nm ± 10%
5. Shut off operating pressure.
11.4
Rotating drive
1. Loosen interface screw [1] (maximum
½
revolution).
2. Turn drive to the desired position.
3. Tighten interface screw [1].
–
Tightening torque: 50 Nm ± 10%
12
Disassembly
DANGER
Risk of injury due to movement of pressurised parts.
The 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 from touching hot surfaces.
Angle seat fitting and actuator can become hot if the temperature of medium is
high. Severe burns are possible.
• Allow the angle seat valve to cool off before working on it.
