The VZ208 is a short stroke and small linear zone valve designed for control of hot and chilled water. The valve is used with a thermo-electric actuators type MZ140. The valves utilise a double O-ring design on the plug to ensure a leak tight seal on both valve ports, this ensures no loss of energy leakage through the valve. It is a BSP male threaded valves with flat face seals, a range of connection sets are available to mate onto pipe. DN20, Kvs: 6. m³/h. Two-way valve, Normally closed without actuator fitted. Pressure class PN16, stroke 2.5 mm. It is recommended to fit a strainer upstream of the valve to increase reliability and to follow water treatment guidelines as detailed in VDI 2035. Valves should be installed in the return pipe to reduce exposure to media temperature extremes.
Specifications:
|
Main |
|
|
Product or component type |
Valve |
|
Valve type |
Zone |
|
Device application |
Fan coil unit |
|
Chilled ceiling |
|
|
Terminal unit |
|
|
Medium compatibility |
Glycol 25 % |
|
Glycol 30 % |
|
|
Water |
|
|
Glycol 50 % |
|
|
Valve configuration |
2-Way |
|
Valve connection type |
G External |
|
Valve connection size |
G 3/4A |
|
Body size |
20 mm (3/4 in) |
|
Pipe size |
20 mm |
|
Flow characteristic |
Uncharacterized |
|
Flow coefficient |
6 kvs |
|
6.94 cv |
|
|
Pressure class |
PN16 |
|
Pressure fluid max delta P quiet service |
62.05 kPa |
|
Pressure fluid max delta P normal life |
103.4 kPa |
|
Seat leakage |
Port A: Class IV-S1 (0.005 %) |
|
Stem movement |
Linear |
|
Trim material |
Brass |
|
body material |
Brass |
|
Stem material |
Stainless steel AISI 303 |
|
Seating seal material |
Port A:EPDM (ethylene propylene diene monomer) |
|
Stem seal material |
EPDM (ethylene propylene diene monomer) |