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Brand: DUNGS
DUNGS VPS 504 S04 Valve Proving System 230 V (219881)
Description
Overview
The VPS 504 is a DUNGS valve proving system for multifunctional gas controls. Its task is to prove the tightness of the safety shut-off valves in a gas train before the burner is allowed to start: the system pressurises the test volume between the valves and monitors the pressure, so that a leaking valve is detected before gas is admitted. The official DUNGS product data lists a maximum operating pressure of 500 mbar, an approval to DIN 1643 and a test volume of up to 4 litres.
This DUNGS VPS 504 unit is identified with order number 219881. Per the original listing the unit is rated 230 V AC, 50 Hz, with a maximum current of 4 A, IP54 enclosure protection and a maximum pressure of 500 mbar.
Engineering & Design
Valve proving works by closing both safety valves, opening a test valve to equalise pressure in the section between them, then closing the test valve and monitoring the pressure over the proving time. If the pressure holds, both valves are tight and the burner release can proceed; if the pressure decays, a valve is leaking and the system locks out.
The VPS 504 is designed to work with multifunctional gas controls, integrating the proving function into the burner control sequence. The unit is approved to DIN 1643, the German standard for valve proving systems, and handles test volumes of up to 4 litres at a maximum operating pressure of 500 mbar.
Key Features
- DUNGS VPS 504 valve proving system for multifunctional gas controls
- Maximum operating pressure: 500 mbar (official DUNGS data)
- Test volume: up to 4 litres (official DUNGS data)
- Approval: DIN 1643 (official DUNGS data)
- 230 V AC, 50 Hz; maximum current 4 A; IP54 (per original listing)
- Order number: 219881
Applications
- Automatic tightness testing of gas safety shut-off valves
- Gas trains with multifunctional gas controls
- Industrial and commercial burner systems
- Safety upgrades to existing gas trains with DUNGS VPS 504 proving
Specifications
| Type | DUNGS VPS 504 |
| Function | Valve proving system for multifunctional gas controls |
| Maximum operating pressure | 500 mbar |
| Test volume | Up to 4 litres |
| Approval | DIN 1643 |
| Voltage | 230 V AC, 50 Hz (per original listing) |
| Maximum current | 4 A (per original listing) |
| Enclosure | IP54 (per original listing) |
| Order number | 219881 |
Compatibility & Integration
The DUNGS VPS 504 is installed in the gas train and wired into the burner control sequence, where it performs the valve proving step before burner start. The 230 V AC, 50 Hz supply matches standard European burner control circuits, and the IP54 enclosure suits installation in the burner cabinet.
Confirm the test volume of the gas train section and the operating pressure against the VPS 504 ratings before selection. Installation and commissioning must be carried out by qualified personnel in accordance with local gas regulations.
Identifying the Correct Unit
DUNGS valve proving systems exist in several versions, so the order number matters more than the type designation alone. Before ordering a replacement, read the label on the installed unit and compare it with the details on this page: type VPS 504, order number 219881, and the electrical rating printed on the housing. If the label shows a different order number, voltage or series letter, send us a photo of the label so we can confirm whether this DUNGS VPS 504 variant is an equivalent replacement or whether a different version is required.
It also helps to note the burner manufacturer, the multifunctional gas control that the unit is mounted on, and the burner control or relay in use, because the proving sequence is wired through that controller.
Installation and Commissioning
The VPS 504 mounts on the multifunctional gas control and senses the pressure in the section between the two safety shut-off valves. On a new or refitted gas train, the commissioning engineer should:
- Isolate the gas supply and electrical power before removing the old unit.
- Fit the new unit with new seals, taking care that no debris enters the gas passages.
- Wire the supply, the burner control release and any lockout signal exactly as the original wiring diagram shows.
- Restore gas and carry out a leak test on all joints with a suitable leak detection method.
- Run several burner start sequences and confirm that the proving step completes and releases the burner each time.
A deliberate test, such as simulating a leaking valve according to the burner manufacturer’s procedure, confirms that the unit locks out as expected. Record the result in the burner commissioning report.
Maintenance and Troubleshooting
Repeated lockouts at the proving stage usually point to the gas train rather than the proving unit. Check the tightness of both safety valves, the inlet pressure, and the joints on the test section before replacing the VPS. Other common causes are:
- Gas pressure above or below the working range during the test
- Loose or corroded terminals in the burner cabinet
- Dirt on the valve seats after pipework modifications
- A test volume larger than the unit is rated for after the gas train was extended
Applications in Oman and the GCC
Valve proving is common on packaged boilers, thermal oil heaters, process furnaces and industrial dryers running on natural gas in Oman’s industrial estates. Plants in Sohar, Rusayl and Salalah often keep a spare proving unit on the shelf because a failed unit stops the burner completely.
Sourcing from Seven Star LLC
Seven Star LLC supplies DUNGS gas train components, including the DUNGS VPS 504, and checks each unit against the label data you provide before dispatch.
Ordering Information
To order the DUNGS VPS 504 valve proving system from Seven Star LLC, the proven solution for automatic valve tightness testing, quote type VPS 504 and order number 219881. We confirm availability and delivery to your site in Oman or anywhere in the GCC, and we verify the ratings against your gas train before dispatch.
Why Seven Star LLC
Seven Star LLC supplies gas train components and burner spares to industrial customers across Oman and the wider GCC region. Every DUNGS VPS 504 valve proving system we supply is checked against the listed ratings before dispatch, and our team confirms the unit matches your gas train before you order.
FAQ
What does the DUNGS VPS 504 do?
The VPS 504 is a valve proving system that automatically tests the tightness of gas safety shut-off valves before the burner is allowed to start, preventing gas from passing through a leaking valve.
What is the pressure rating of the VPS 504?
The maximum operating pressure is 500 mbar, with a test volume of up to 4 litres, per official DUNGS product data.
Which approval does the VPS 504 carry?
The VPS 504 is approved to DIN 1643, the German standard for valve proving systems.
What is the electrical rating of the VPS 504?
Per the original listing: 230 V AC, 50 Hz, maximum current 4 A, IP54 enclosure protection.
What is the order number of this VPS 504?
The DUNGS order number is 219881, as stated in the original listing.
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Datasheets & Documents
- Datasheet DUNGS VPS 504 219881 Datasheet Download
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About brand
Open the gas train cabinet of a boiler or an industrial burner and there is a good chance the valves and pressure switches inside are marked DUNGS. Karl Dungs was founded in 1945 and is based in Urbach, Germany, and it makes gas valves and combustion controls for heating, process heat and gas engines. Seven Star LLC sources and supplies DUNGS gas valves, regulators, pressure switches and valve proving systems for burner operators in Oman, identified by type designation and article number.
DUNGS product families listed here
The listed DUNGS gas valves and controls make up most of a burner gas train. The FRS is a spring-loaded gas pressure regulator in sizes from Rp 3/8 to DN 150. The GW A6 is a compact pressure switch for gas and air. DMV-D double solenoid valves, such as the DMV-D 507/11 and DMV-D 5125/11, combine two safety shut-off valves in one body, and the SV-D is a single safety solenoid valve. The MB-DLE 405 to 412 B01 GasMultiBloc integrates a filter, a regulator and two valves in one compact unit. The VPS 504 is a valve proving system that tests the tightness of the two shut-off valves before burner start.
Where DUNGS equipment is used
DUNGS combustion controls are fitted to steam and hot water boilers, thermal oil heaters, air heaters, dryers, ovens, kilns and furnaces, and to the fuel gas lines of gas engines. Buyers in the GCC typically need them as replacements on packaged burners in food plants, laundries, hospitals and building plant rooms.
Ordering DUNGS parts: what we need
Send the full type designation and the six-digit article number from the nameplate, for example VPS 504 S04 with 219881, a 230 V version. Add the coil voltage and frequency, the connection (Rp thread or flange DN), and the maximum inlet pressure. For an FRS regulator, state the outlet pressure and the spring range or spring color. For a GW pressure switch, state the setting range, which is part of the type name. For a MultiBloc, say whether operation is single-stage or two-stage. The burner make and model help us confirm the match.
Browse DUNGS products by category: Solenoid Valve.
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Frequently Asked Questions
What does the DUNGS VPS 504 do?
The VPS 504 is a valve proving system that automatically tests the tightness of gas safety shut-off valves before the burner is allowed to start, preventing gas from passing through a leaking valve.
What is the pressure rating of the VPS 504?
The maximum operating pressure is 500 mbar, with a test volume of up to 4 litres, per official DUNGS product data.
Which approval does the VPS 504 carry?
The VPS 504 is approved to DIN 1643, the German standard for valve proving systems.
What is the electrical rating of the VPS 504?
Per the original listing: 230 V AC, 50 Hz, maximum current 4 A, IP54 enclosure protection.
What is the order number of this VPS 504?
The DUNGS order number is 219881, as stated in the original listing.
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