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Brand: DUNGS
Dungs SV-D 505 Safety solenoid valve Nominal width Rp 1/2 – Rp 2
Description
Overview
The SV-D 505 is a gas solenoid valve with valve body, supplied as a safety shut-off valve for gas supply lines. As stated in the original listing, the DUNGS SV-D 505 valve is manufactured by DUNGS and carries order number 240334, and covers nominal widths from Rp 1/2 to Rp 2 with a maximum pressure of 500 mbar. The coil is rated 230 V, 50 Hz.
Gas solenoid valves of this type are the safety element of a gas train: they are held open electrically during normal operation and close automatically when the coil is de-energised, cutting the gas supply to the burner or appliance. This fail-safe behaviour is what makes the SV-D 505 suitable for safety shut-off duty in gas-fired systems.
Engineering & Design
The valve is a spring-return solenoid valve: when the 230 V 50 Hz coil is energised, the valve opens and allows gas to flow; when the coil is de-energised, the spring closes the valve positively. The design is rated for a maximum pressure of 500 mbar and is classified pressure class A, with a nominal width range of Rp 1/2 to Rp 2 as listed.
The body is fitted with a 1/2 inch pipe connection as per the original listing. Installation follows the normal gas train sequence, with the safety valve positioned so that the gas supply can be shut off positively when the burner control demands it.
Key Features
- Gas solenoid valve with body, type SV-D 505 — the DUNGS SV-D 505 model
- Nominal width range: Rp 1/2 to Rp 2 (per listing)
- Maximum pressure: 500 mbar (per listing)
- Coil: 230 V, 50 Hz
- Pressure class A (per listing)
- Order number: 240334; manufacturer: DUNGS (per listing)
Applications
- Safety shut-off in gas trains of industrial burners
- Gas supply control for boilers and process heating equipment
- Shut-off duty in commercial and light industrial gas installations
- Replacement DUNGS SV-D 505 valve for existing gas train maintenance
Specifications
| Model | DUNGS SV-D 505 |
| Type | Gas solenoid valve with body |
| Nominal width | Rp 1/2 to Rp 2 |
| Maximum pressure | 500 mbar |
| Voltage | 230 V, 50 Hz |
| Pipe connection | 1/2 inch (per listing) |
| Class | A |
| Order number | 240334 |
| Manufacturer | DUNGS (per listing) |
Compatibility & Integration
The DUNGS SV-D 505 is installed in the gas train between the gas supply and the burner, upstream of the pressure regulator and the burner controls. Because gas train valves must match the system pressure rating, gas type and pipe size, confirm the nominal width and 500 mbar rating against the existing train before fitting.
Installation and commissioning of gas safety valves must be carried out by qualified personnel in accordance with local gas regulations. Our team can confirm the listed ratings against your application and advise on the correct spares for your gas train.
Ordering Information
To order the DUNGS SV-D 505 gas solenoid valve from Seven Star LLC, quote the model, order number 240334 and the pipe size required. We confirm availability and delivery to your site in Oman or anywhere in the GCC, and we check the listed ratings 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 SV-D 505 gas solenoid valve we supply is checked against the listed ratings before dispatch, and our team confirms the valve matches your gas train before you order.
FAQ
What is the DUNGS SV-D 505?
It is a gas solenoid valve with body, type SV-D 505, used for safety shut-off of gas supply, with order number 240334 as per the original listing.
What is the pressure rating of the SV-D 505?
The maximum pressure is 500 mbar and the valve is listed as pressure class A, covering nominal widths from Rp 1/2 to Rp 2.
What coil voltage does the SV-D 505 use?
The coil is rated 230 V, 50 Hz per the original listing, with a 1/2 inch pipe connection.
Is the SV-D 505 a fail-safe valve?
Yes. The valve closes automatically when the coil is de-energised, which is the fail-safe behaviour required of a gas safety shut-off valve.
Where is the SV-D 505 installed?
It is installed in the gas train between the gas supply and the burner, upstream of the pressure regulator and burner controls, by qualified personnel in line with local gas regulations.
Reading the Valve Nameplate
The SV-D 505 family covers several pipe sizes, so the size of the valve you are replacing matters as much as the type. Before ordering, check the nameplate and coil label of the installed valve and note:
- The type designation and the order number printed on the valve body.
- The actual thread size of the inlet and outlet connections.
- The coil voltage and frequency, which must match the burner control output.
- The maximum operating pressure and the gas family the valve is approved for.
- Any accessories fitted to the valve, such as a proof-of-closure switch or a filter.
A photo of the nameplate is usually enough for our team to confirm the correct replacement.
Commissioning After Installation
Once a qualified gas engineer has fitted the valve, the gas train should be tested before the burner is put back into service:
- Check the flow direction arrow on the body matches the gas flow.
- Leak-test all joints with a suitable leak detection fluid or an electronic detector, never with a flame.
- Confirm the valve opens when energised by the burner control and closes quickly when power is removed.
- Where a valve proving system is installed, run a proving cycle to confirm tightness of the closed valve.
Maintenance and Troubleshooting
- Valve does not open: no voltage at the coil, wrong coil voltage, burnt coil or inlet pressure above the rated maximum.
- Humming or chattering: low supply voltage or dirt between the armature and the core.
- Seat leakage: dirt or debris on the seal; an upstream gas filter protects the seat and is worth checking at every service.
- Coil runs very hot: check supply voltage and ambient temperature at the installation point.
A gas safety valve that fails a tightness test should be replaced rather than repaired on site.
Applications in Oman and the GCC
Low-pressure gas trains fitted with valves of this type are common on boilers, thermal oil heaters, bakery and food-processing ovens, laundries and hotel kitchens across Oman. Outdoor gas trains should be shaded from direct sun, as high ambient temperatures increase coil temperature.
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Datasheets & Documents
- Datasheet Dungs SV / SV-D Safety Solenoid Valve 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 is the DUNGS SV-D 505?
It is a gas solenoid valve with body, type SV-D 505, used for safety shut-off of gas supply, with order number 240334 as per the original listing.
What is the pressure rating of the SV-D 505?
The maximum pressure is 500 mbar and the valve is listed as pressure class A, covering nominal widths from Rp 1/2 to Rp 2.
What coil voltage does the SV-D 505 use?
The coil is rated 230 V, 50 Hz per the original listing, with a 1/2 inch pipe connection.
Is the SV-D 505 a fail-safe valve?
Yes. The valve closes automatically when the coil is de-energised, which is the fail-safe behaviour required of a gas safety shut-off valve.
Where is the SV-D 505 installed?
It is installed in the gas train between the gas supply and the burner, upstream of the pressure regulator and burner controls, by qualified personnel in line with local gas regulations.
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