Festo VZXA-***-M Series, Инструкция по применению

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15 Technical data
General VZXA-A-...-M-... VZXA-B-...-M-...
Design Poppet valve with diaphragm actuator
Mounting position Any
Type of mounting In-line installation
Valve function 2/2
Flow direction Non-reversible
Medium
1)
Compressed air grade of
filtration 200 μm, inert
gases, vapour Compressed air grade of
filtration 200 μm, inert
gases, water, petroleum,
neutral liquid media,
petroleum based
hydraulic oil, vapour
Medium pressure [bar] 0…30, in accordance with the specification on the
rating plate
Viscosity [mm
2
/s]
š
600
Temperature of medium [°C]
Seat seal material: PTFE –10...+180
Perm. min./max. temp (TS) [°C]
Seat seal material: PTFE –10...+180
Ambient temperature [°C] 0…+60
Operating medium Compressed air in accordance with
ISO 8573-1:2010 [7:4:4]
Operating pressure [bar] Max. 7 (
è
Fig. 10 to Fig. 15)
Degree of protection for actuator IP65, IP67,
IP67K (with guided exhaust air)
Valve housing connection
VZXA-...-T-S6 Threaded collar in accordance with DIN ISO 228
VZXA-...-T-S7 Threaded collar in accordance with ANSI/ASME
B 1.20.1
VZXA-...-T-S13 Threaded collar in accordance with DIN 10226
Operating medium port G
Á
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-...-T PTFE
Actuator housing Stainless steel casting (1.4408)
Diaphragm actuator seals NBR
Actuator rod High-alloy stainless steel
Actuator cover Stainless steel casting
Product weight
è
www.festo.com/catalogue
CE marking (see declaration of conformity
è
www.festo.com/sp)
In accordance with EU Pressure Equipment Directive
1) Other media on request
Fig. 8
Nominal pressure, burst pressure and flow rate
Connection size [”] 1 1¼ 1½ 2 2½
Nominal width DN 25 32 40 50 65
Nominal pressure process valve PN (up to 200 °C temperature of medium)
VZXA-...-T [bar] 40 25
Burst pressure (up to 200 °C temperature of medium)
VZXA-...-T [bar] 200 125
Flow rate K
v
1)
VZXA-B-...-T-...-90 [m
3
/ h] 23.6 33.1 49.0 60.4 77.9
VZXA-A-...-T-...-90 [m
3
/ h] 24.7 35.4 47.4 68.5 77.4
1) Water, at +20 °C, medium pressure 1 bar at the valve input, free outlet
Fig. 9
Medium pressure and operating pressure for valves with medium flow under
valve seat VZXA-B-...-M-90-...-S (Medium flow under valve seat, NO)
Nominal width DN 32 40 50 65
Max. medium pressure [bar] 16 12.2 5.8
Min. operating pressure [bar] 3.3 4.2 5
Fig. 10
Operating pressure [bar]
Medium pressure [bar]
DN32 DN40 DN50
DN65
Fig. 11
VZXA-B-...-M-90 (Medium flow under valve seat, NC)
Nominal width DN 25 32 40 50 65
Max. medium pressure [bar] 30 25 16 10 5.6
Min. operating pressure [bar] 5
Fig. 12
VZXA-B-...-M-90-...-PR
(Medium flow under valve seat, NC with reduced spring force)
Nominal width DN 25 32 40
Max. medium pressure [bar] 14.5 7.5 6
Min. operating pressure [bar] 2.1
Fig. 13
Medium pressure and operating pressure for valves with medium flow over
valve seat VZXA-A-...-M-90-...-PR
(Medium flow over valve seat, NC with reduced spring force)
Nominal width DN 32 40 50 65
Max. medium pressure [bar] 16 8
Min. operating pressure [bar] 2.4 3 4.4 5
Fig. 14
Operating pressure [bar]
Medium pressure [bar]
DN32 DN40 DN50
DN65
Fig. 15