Festo VZXA-K, Instructions, Operation

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14 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.
Valve housing 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.
WARNING!
Risk of injury due to slipping or falling objects.
The angle seat valve can weigh up to 5.75 kg, depending on the product version.
Body parts can be crushed.
•
Secure angle seat valve against falling or slipping using appropriate means of
securing.
1. Depressurise the piping and the connecting cable of the operating medium.
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 draining media in a suitable container.
3. Disconnect the connecting cable of the operating medium from the valve.
4. Disconnect the piping connections and remove the valve.
15 Disposal
– Dispose of the product in an environmentally friendly manner. In doing so,
take the remaining media into account (use of problematic materials if applic-
able)
– Observe the local regulations for environmentally friendly disposal.
16 Technical data
16.1 Technical data, general
Type VZXA-...-K
Constructive design Poppet valve with piston drive
Actuation type Pneumatic
Sealing principle Soft
Mounting position Any
Type of mounting In-line installation
Valve function 2/2
Flow direction Non-reversible
Product weight è www.festo.com/catalogue
CE marking in accordance with declaration of conformity
è
www.festo.com/sp
Medium
Medium VZXA-A-... Compressed air grade of filtration 200 ì m, inert gases,
vapour
1)
Medium VZXA-B-... Compressed air grade of filtration 200 ì m, inert gases,
water, neutral liquid media, petroleum, petroleum
based hydraulic fluid, vapour
Medium pressure [bar] –0.9 … 30, in accordance with information on product
labelling
Viscosity [mm
2
/s]
£
600
Operating medium
Operating medium Compressed air to ISO 8573-1:2010 [7:4:4]
Operating pressure [bar] max. 10
è
16.2 Technical data, pneumatic
Ambient conditions
Temperature of medium
(modified PTFE seat seal
material) [°C] –30 … +200
Temperature of medium
(PTFE seat seal material) [°C] –10 … +180
Permissible min./max. tem-
perature (TS) (modified PTFE
seat seal material) [°C] –30 … +200
Permissible min./max. tem-
perature (TS) (PTFE seat seal
material) [°C] –10 … +180
Ambient temperature [°C] 0 … +60
Actuator degree of protection IP65, IP67, IP67K (with guided exhaust air)
Valve housing connection
VZXA-...-TS6 Threaded collar in accordance with DIN ISO 228
VZXA-...-TS7 Threaded collar in accordance with ANSI/ASME B 1.20.1
VZXA-...-TS13 Threaded collar in accordance with DIN ISO 10226
Operating medium port G Á
Type VZXA-...-K
Note on materials
Valve housing VZXA-...-V13 Stainless steel casting (1.4409)
Valve housing VZXA-...-V14 Stainless steel casting (ASTM A351-CF3M)
Seat seal VZXA-...-TP PTFE modified
Seat seal VZXA-...-T PTFE
Drive housing Stainless steel casting (1.4408)
Piston drive seals FPM
Actuator stem High-alloy stainless steel
Actuator cover Stainless steel casting (1.4408)
1) other media on request
Tab. 8 Technical data, general, VZXA
16.2 Technical data, pneumatic
Nominal pressure, burst pressure and flow rate of valve body VZXA-...-TS
Connection size ["] ½ ¾ 1 1
¼
1
½
2
Nominal width DN 13 20 25 32 40 50
Nominal pressure of fitting
PN
(up to 200°C temperature of
medium) [bar] 40 25
Burst pressure
(up to 200°C temperature of
medium) [bar] 200 125
Flow rate K
v1)
VZXA-B-...-46 [m
3
/h 6.0 13.3 20.3 27.9 -
VZXA-A-...-46 [m
3
/h 6.6 13.3 20.0 29.8 -
VZXA-B-...-75 [m
3
/h 5.9 13.5 22.6 30.3 41.4 50.1
VZXA-A-...-75 [m
3
/h 6.6 14.5 21.5 33.0 44.9 54.6
1) water, at + 20 °C, media pressure 1 bar at valve inlet, free discharge
Tab. 9 Technical data, pneumatic, VZXA- -TS
Media pressure and operating pressure VZKA-B-...-K-46-...-S (media flow under
valve seat, NO)
Nominal width
DN 13 20 25
Max. media pressure [bar] 16 13.5 8.3
Min. operating pres-
sure [bar] 3.4 5
Tab. 10 Limit values of media pressure and operating pressure VZKA-B-...-
M-46-...-S
DN13 DN20
DN25
p1 Medium pressure p2 Operating pressure
Fig. 3 Media pressure and operating pressure VZKA-B-...-K-46-...-S