Valve testing system
VPS 508 for multiple actuators

Technical description
The VPS 508 is the valve proving system for DUNGS multiple actuators. The valve proving system complies with EN 1643:
- Equipment operates independent of residual pressure in the range of the permissible operating range.
- Test volume ≤ 8 l
- Setting work not necessary on site
- Short test period: min. 10 s, max. 34 s
- Tightness or leaks are displayed by an LED
- External fault display possible for series 04 and S05
- Suitable for TRD systems
- Electrical connection possible by plug connection S03. No rewiring is required for contact allocation as per DIN 4791.
- S04 and S05: electrical connection at screw terminals via PG 13.5 cable entry

Application
Valve proving system for DUNGS single valves, DMV double solenoid valve and GasMultiBloc MB.
The VPS 508 can also be used for monitoring the DUNGS solenoid valves up to DN 100, with and without bypass connection. 24 VDC design for gas motors. Suitable for gases of gas families 1, 2, 3 and other neutral gaseous media.

Approvals
EC type test approval as per EC Gas Appliance Directive:
VPS 508…     CE-0085 AP 0168
EC type test approval as per EC Pressure Equipment Directive: 
VPS 508…     CE0036

Approvals in other important gas consuming countries.

VPS 508 Valve proving system for automatic shutoff valves as per EN 161, Class A and Class B
The VPS 508 may be used with any other valve whose tightness in counter-flow direction excludes by construction a leakage in flow direction. The VPS 508 is suitable for all DUNGS valves according to EN 161 Classes A and B.