Festo VZXA Series, Operating Instructions

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2.
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.
1. Depressurise the piping and the connecting cable of the operating medium.
Allow the valve and piping to cool.
Drain 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 the connecting cable of the operating medium from the valve.
4. Disconnect the piping connections and remove the valve.
13 Technical data
13.1 Technical data, general
VZXA-...-C.../W...-...-K-46-...-PM
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
Direction of flow not reversible
Product weight
è
www.festo.com/catalogue
Medium
Medium VZXA-A-…
Compressed air grade of filtration 200
ì
m, inert
gases 1)
Medium VZXA-B-… Compressed air grade of filtration 200 ì m, inert
gases, water, neutral liquid media, petroleum, petro-
leum-based hydraulic fluid, vapour
Pressure of medium [MPa] 0 … 2.5, as specified on product labelling
[bar] 0 … 25, as specified on product labelling
[psi] 0 … 362.5, as specified on product labelling
Viscosity [mm 2 /s]
£
600
Operating medium
Operating medium
Compressed air in accordance with
ISO 8573-1:2010 [7:4:4]
Operating pressure [MPa] max. 0.7
è
13.2 Technical data, pneumatic
[bar] max. 7
è
13.2 Technical data, pneumatic
[psi] max. 101.5
è
13.2 Technical data, pneumatic
Ambient conditions
Temperature of medium
VZXA-A-… [°C] –10 … +60
VZXA-B-… [°C] –10 … +180
Ambient temperature [°C] 0 … 60
Drive degree of protection IP65, IP67
Outdoor use Weatherproof locations class C1 in accordance with
EN 60654-1
Connection for angle seat fit-
ting
VZXA-…-CS5
Clamp connection in accordance with DIN 32676,
Series A
VZXA-…-CS15 Clamp connection in accordance with DIN 32676,
Series B
VZXA-…-CS1 Clamp connection in accordance with ASME BPE
VZXA-…-WS2 Welded end in accordance with DIN 11850 R2
VZXA-…-WS3 Welded end in accordance with
DIN EN ISO 1127/ISO 4200
VZXA-…-WS1 Welded end in accordance with ASME BPE
Operating medium port G 1/8
Information on materials
Valve housing VZXA-…-V13
Stainless steel casting (1.4409)
Valve housing VZXA-…-V14 Stainless steel casting (ASTM A351-CF3M)
Seat seal VZXA-…-T PTFE
Drive housing PA-reinforced
Piston drive seals FPM
Actuator stem High-alloy stainless steel
Drive cover Stainless steel casting (1.4408)
1) Other media on request
Tab. 4: Technical data, general, VZXA
13.2 Technical data, pneumatic
Nominal pressure, burst pressure and flow rate of angle seat fitting VZXA-...-
CS/WS
Port size ["]
½ ¾
1
1 ¼
Nominal width DN 13 20 25 32
Port size ["]
½ ¾
1
1 ¼
Nominal pressure of angle seat fitting
PN
(to max. temperature of medium) [MPa] 2.5
[bar] 25
[psi] 362.5
Burst pressure
(to max. temperature of medium) [MPa] 12.5
[bar] 125
[psi] 1813
Flow rate K
v
1)
VZXA-A-CS5/WS2-…-…-46-…-PM [m 3 /h] 5.8 12.2 18.4 25.7
VZXA-A-CS15/WS3-…-…-46-…-PM [m 3 /h] 5.5 11.2 17.3 23.1
VZXA-A-CS1/WS1-…-…-46-…-PM [m
3
/h] 2.1 8.6 12.9 —
VZXA-B-CS5/WS2-…-…-46-…-PM [m 3 /h] 5.3 12.8 17.4 23.4
VZXA-B-CS15/WS3-…-…-46-…-PM [m 3 /h] 5.2 12.4 16.4 21.6
VZXA-B-CS1/WS1-…-…-46-…-PM [m
3
/h] 2.2 8.1 14 —
1) Water, at +20 °C, pressure of medium 1 bar at the valve inlet, free outlet
Tab. 5: Technical data, pneumatic, VZXA-...-CS/WS
Medium pressure and operating pressure VZXA-B-…-K-46-…-S (media flow
under valve seat, N/O)
Nominal width DN 13 20 25
Pressure of medium [MPa] 0 … 1.6 0 … 1.35 0 … 0.83
[bar] 0 … 16 0 … 13.5 0 … 8.3
[psi] 0 … 232 0 … 195.8 0 … 120.4
Min. operating pressure [MPa] 0.34 0.5
[bar] 3.4 5
[psi] 49.3 72.5
Tab. 6: Medium pressure and operating pressure VZXA-B-...-K-46-...-S
Fig. 3: Medium pressure and operating pressure VZXA-B-…-K-46-…-S
p1 Pressure of medium
p2 Operating pressure
DN13
DN20
DN25
Pressure of medium and operating pressure VZXA-B-…-K-46-…-D (media flow
under valve seat, double-acting)
Nominal width DN 13 20 25 32
Pressure of medium [MPa] 0 … 1.6 0 … 0.6
[bar] 0 … 16 0 … 6
[psi] 0 … 232 0 … 87
Min. operating pressure [MPa] 0.28 0.31 0.48 0.5
[bar] 2.8 3.1 4.8 5
[psi] 40.6 45 69.6 72.5
Tab. 7: Pressure of medium and operating pressure VZXA-B-...-K-46-...-D
Fig. 4: Pressure of medium and operating pressure VZXA-B-…-K-46-…-D
p1 Pressure of medium
p2 Operating pressure
DN13
DN20
DN25
DN32