When you build or maintain a gas train, the small accessories you choose can make or break the system. The DUNGS Rp 1/2 flange DU215790 looks like a simple connector, but it plays a critical role in safety, serviceability, and compliance. In this guide, we’ll unpack what the DUNGS Rp 1/2 flange DU215790 actually does, how it is built, where it fits in your gas train design, and why it’s trusted in industrial and commercial combustion systems worldwide.
Whether you’re designing a new burner system, upgrading existing gas trains, or supporting field technicians, understanding the DUNGS Rp 1/2 flange DU215790 will help you choose parts that are safe, scalable, and easy to maintain.
What is the DUNGS Rp 1/2 Flange DU215790?
At its core, the DUNGS Rp 1/2 flange DU215790 is an engineered adapter that links your threaded gas pipework to DUNGS gas controls such as valves, regulators, and multibloc assemblies. On one side you have a rectangular mounting flange that bolts directly to a DUNGS device; on the other side you get an Rp 1/2 (BSP parallel) internal thread for your 1/2" gas line.
The idea is simple, but the execution is precise. The DUNGS Rp 1/2 flange DU215790 is designed to:
- Provide a leak-tight mechanical interface between pipework and DUNGS combustion controls.
- Maintain the pressure rating and certifications of the complete gas train.
- Offer a convenient pressure test point via its integrated 1/8" BSP tapping.
- Support a modular, service-friendly gas train layout where components can be swapped without reworking the entire line.
Instead of improvising adapters or fabricating one-off solutions, installers can rely on the DUNGS Rp 1/2 flange DU215790 to match the bolt pattern, sealing groove, and mechanical properties specified by DUNGS. That’s why it’s such a common sight on industrial burners, boilers, ovens, dryers, and HVAC gas trains built around DUNGS components.
Key Technical Specs of the DUNGS Rp 1/2 Flange DU215790
Before you select a flange, it helps to understand exactly what you’re working with. The DUNGS Rp 1/2 flange DU215790 is built to meet the demands of modern gas combustion systems, both in terms of performance and compliance.
Here are the key technical details that define the DUNGS Rp 1/2 flange DU215790:
- Thread size: Rp 1/2 (BSP parallel internal thread)
- Flange footprint: 62 × 71 mm rectangular plate
- Material: High-strength die-cast aluminium alloy
- Weight: Approx. 0.09 kg (around 0.2 lbs)
- Operating pressure rating: Up to 500 mbar (≈ 7 psi)
- Test port: Integrated 1/8" BSP tapping for pressure measurement
- Mounting: Four bolt holes for secure attachment
- Thread standard: ISO 7-1 / EN 10226 compliant parallel pipe threads
- Sealing method: O-ring or flat gasket between flange and device, one seal per flange
In practice, this means the DUNGS Rp 1/2 flange DU215790 is light but robust, compatible with standard European BSP pipework, and fully aligned with the pressure limits of typical appliance regulators and gas valves in its class.
Because the DUNGS Rp 1/2 flange DU215790 is rated to 500 mbar, it will not be the weak link in a properly designed DUNGS gas train. Its test port allows you to tap into the line for commissioning and troubleshooting without drilling additional holes or installing extra fittings.
How the DUNGS Rp 1/2 Flange DU215790 is Designed for Real-World Loads
It’s easy to underestimate how much stress a flange must absorb over time. Gas trains experience pressure cycles, temperature changes, and vibration from valves opening and closing. The DUNGS Rp 1/2 flange DU215790 is carefully designed to keep up with these conditions.
Because the flange body is made from die-cast aluminium, the DUNGS Rp 1/2 flange DU215790 balances strength with low weight. A lighter flange reduces strain on valve bodies, regulators, and pipework, especially when you have multiple components hanging off a burner train. The precision-machined threads and sealing surfaces help achieve a repeatable, leak-free seal.
The Rp 1/2 thread is a parallel BSP thread, not tapered. That means the DUNGS Rp 1/2 flange DU215790 relies on thread sealant or a sealing washer on the pipe side, and an O-ring or gasket on the device side, rather than the thread itself forming the seal. This approach is common in regulated gas equipment because it gives more control over where the seal occurs and reduces the risk of thread galling or over-tightening.
On the device side, the flange is bolted against a machined face on the DUNGS valve or regulator. The seal (usually an O-ring supplied by DUNGS) is compressed between the two faces as you torque down the bolts. When installed correctly, the DUNGS Rp 1/2 flange DU215790 comfortably handles continuous duty in industrial applications.
Compliance, Safety and Certifications Behind the DUNGS Rp 1/2 Flange DU215790
Gas safety components are only as trustworthy as the standards they follow. While the flange itself may not carry a separate label, the DUNGS Rp 1/2 flange DU215790 is part of larger assemblies that are rigorously tested and certified.
When used on DUNGS regulators, multibloc valves, or dual shutoff valves, the DUNGS Rp 1/2 flange DU215790 is covered by the approvals of those products. These typically include:
- CE conformity under the Gas Appliance Regulation (EU) 2016/426 and the Pressure Equipment Directive (PED).
- UL and CSA approvals when used in North American-certified assemblies.
- Compliance with EN 161 (automatic shutoff valves) and related European gas safety standards.
- Adherence to ISO 7-1 / EN 10226 for thread geometry and sealing requirements.
- Manufacture under an ISO 9001 quality management system.
Because the flange is designed as a genuine DUNGS accessory, using the DUNGS Rp 1/2 flange DU215790 helps maintain the certification status of the overall gas train. Swapping it for a non-genuine adapter or a fabricated plate might seem like a shortcut, but it can compromise approvals and introduce unknown leak paths.
From a safety perspective, the 500 mbar pressure rating of the DUNGS Rp 1/2 flange DU215790 matches or exceeds the operating pressures of the devices it connects to. That means the flange will not reduce the safe working pressure of a certified DUNGS valve or regulator.
Compatible DUNGS Components and Accessories
The DUNGS Rp 1/2 flange DU215790 is not a standalone star; it is meant to work in harmony with specific DUNGS valves and regulators. Knowing where it fits makes sizing and selection much easier.
Typical compatible components for the DUNGS Rp 1/2 flange DU215790 include:
- DUNGS MultiBloc (MB) valves – especially the smaller MB 405/407 series, where the common valve body accepts different flange sizes, including the Rp 1/2 variant.
- DUNGS DMV dual safety shutoff valves, such as the DMV 701 body size, which uses the same 62 × 71 mm flange footprint as the DUNGS Rp 1/2 flange DU215790.
- DUNGS FRI series regulators (e.g., FRI 705/6, FRI 707/6), where flanged connections can be fitted with Rp 1/2 flanges for stand-alone use.
Alongside the flange itself, the DUNGS Rp 1/2 flange DU215790 is typically supported by:
- O-rings or flat gaskets specifically sized for the valve or regulator opening.
- Bolt kits (often M6 × 30 mm bolts for this body size), including lock washers.
- An integrated test port plug or test nipple for the 1/8" BSP pressure tapping.
When you buy a complete flange kit or device mounting kit, you often get everything needed to mount two flanges on an FRI regulator or DMV valve. That means the DUNGS Rp 1/2 flange DU215790 can be mounted quickly, with hardware that matches the recommended torque and material specs.
Using genuine gaskets and bolts is more than a convenience—it ensures the DUNGS Rp 1/2 flange DU215790 performs as tested. Substituting random seals or low-grade fasteners can introduce leaks, creep, or uneven gasket compression over time.
Alternative Flange Models and When to Use Them
The DUNGS Rp 1/2 flange DU215790 is just one member of a broader flange family. If your gas system uses different pipe sizes or regional thread standards, DUNGS provides alternatives that mirror the same design principles.
Common alternatives to the DUNGS Rp 1/2 flange DU215790 include:
- Rp 3/4, Rp 1, Rp 1 1/4, Rp 1 1/2, and Rp 2 flanges for larger valves and higher flow applications.
- NPT threaded versions (e.g., 1/2" NPT, 3/4" NPT, 1" NPT) for North American piping standards.
- Flange kits that bundle the flange, gasket, bolts, and sometimes a dedicated test nipple.
- Direct-mount adapters that couple two DUNGS devices (such as a regulator and valve) directly without using threaded flanges between them.
From a design perspective, you would choose the DUNGS Rp 1/2 flange DU215790 when:
- Your valve or regulator uses the small DUNGS body with a 62 × 71 mm bolt pattern.
- Your pipework is 1/2" BSP parallel (Rp 1/2) and you want a clean, direct connection.
- You want a compact, low-mass connection that preserves the certifications of your gas train.
On the other hand, you might select an NPT version instead of the DUNGS Rp 1/2 flange DU215790 if your installation is in a region where NPT is mandated by code or is the standard in the facility. The functionality is the same; only the thread type on the pipe side differs.
Because all these flanges share similar materials, pressure ratings, and test port features, you can standardise your design philosophy. The DUNGS Rp 1/2 flange DU215790 becomes your default choice for 1/2" BSP systems, while other sizes take over as flow and valve body sizes increase.
How to Install the DUNGS Rp 1/2 Flange DU215790 Step by Step
Installing the DUNGS Rp 1/2 flange DU215790 is straightforward, but it must be done carefully. A rushed installation can lead to leaks, misalignment, or damaged seals. Here’s a practical step-by-step approach that aligns with standard gas fitting practices.
1. Prepare the components
Before you bolt anything together, gather:
- The DUNGS Rp 1/2 flange DU215790.
- The matching O-ring or gasket supplied for that valve or regulator.
- The required M6 mounting bolts and washers.
- The DUNGS valve or regulator you’re connecting to.
- Your 1/2" pipe or fitting and appropriate thread sealant.
Check that the bearing surfaces of the device and the DUNGS Rp 1/2 flange DU215790 are clean, undamaged, and free from debris. Inspect the seal for cuts or flattening. If you’re reassembling an older system, replace the O-ring or gasket as a matter of good practice.
2. Position the flange and seal
Place the seal in its recess around the port on the valve or regulator, or on the face of the DUNGS Rp 1/2 flange DU215790, depending on the design. Carefully align the flange so that its four bolt holes match the threaded holes in the device.
At this point, think ahead about the position of the test port. Rotate the DUNGS Rp 1/2 flange DU215790 so that the 1/8" BSP tapping is accessible for future pressure measurements—usually facing up or sideways where a technician can easily attach a manometer hose.
3. Tighten the mounting bolts evenly
Insert the bolts through the flange and into the device. Tighten them by hand first, then use a wrench or driver to snug them down in a criss-cross pattern. This pattern helps compress the O-ring or gasket evenly under the DUNGS Rp 1/2 flange DU215790.
Follow the torque values recommended in the DUNGS manual. For M6 bolts, this is typically in a modest range (often around 5–6 Nm, but always refer to the specific datasheet). Over-tightening might distort the seal or strip threads in the aluminium body; under-tightening may allow leaks.
4. Connect the pipework to the Rp 1/2 thread
Once the DUNGS Rp 1/2 flange DU215790 is firmly seated, you can connect the 1/2" pipe or fitting. Apply a gas-rated PTFE tape or approved pipe sealant to the male thread of the pipe—not the female thread in the flange. This reduces the risk of excess compound entering the gas path.
Thread the pipe into the DUNGS Rp 1/2 flange DU215790 and tighten with a wrench. Avoid using the flange itself as your only leverage point; try to support the valve or regulator so you’re not twisting the whole assembly. Because Rp threads are parallel, the sealant (not the thread interference) is responsible for sealing the joint, so spread it evenly.
5. Use and reseal the test port
To commission the system, you may use the test port on the DUNGS Rp 1/2 flange DU215790 to measure inlet or outlet gas pressure. Typically, the test tapping is closed with a small screw and sealing washer or O-ring.
To read the pressure:
- Slightly loosen or remove the plug on the DUNGS Rp 1/2 flange DU215790.
- Attach your manometer hose or test nipple.
- Take your readings during operation.
- Remove the hose and refit the plug, ensuring a snug seal.
Always double-check that the plug is fully tightened and that any small sealing washer is in place. Leaving the test port loose is a common cause of slow leaks and nuisance gas odours.
6. Perform final leak checks
With the system pressurised but before lighting any burners, thoroughly check the DUNGS Rp 1/2 flange DU215790 area for leaks. Use an approved leak detection spray or a soap solution around:
- The flange-to-device joint.
- The Rp 1/2 pipe connection.
- The test port plug.
If you see bubbles or detect a gas smell near the DUNGS Rp 1/2 flange DU215790, shut down the system, depressurise, and correct the issue before proceeding. Once everything checks out, you’re ready to bring the gas train online.
Typical Applications for the DUNGS Rp 1/2 Flange DU215790
Because of its size, pressure rating, and compatibility, the DUNGS Rp 1/2 flange DU215790 is used across a wide range of low to medium-capacity gas systems. Anywhere you find smaller DUNGS valves, regulators, or multi-blocs, you’re likely to see this flange.
Here are some of the most common application areas for the DUNGS Rp 1/2 flange DU215790:
Industrial burners and boilers
In factories and commercial sites, small to medium gas burners on boilers, heaters, and process equipment often rely on compact DUNGS gas trains. A typical chain might include a filter, FRI regulator, DMV dual safety shutoff valve, and pressure switches.
The DUNGS Rp 1/2 flange DU215790 connects this train to the main gas supply and to the burner inlet when the line size is 1/2". Technicians appreciate being able to remove a valve or regulator simply by unbolting the flange, leaving the threaded pipework intact. This reduces downtime and makes the DUNGS Rp 1/2 flange DU215790 particularly valuable in high-utilisation plants.
HVAC gas trains in packaged equipment
Packaged rooftop units, make-up air heaters, and other HVAC appliances sometimes ship with DUNGS valves and regulators as part of their gas trains. On these units, the DUNGS Rp 1/2 flange DU215790 often provides the interface between field piping and the factory-assembled multibloc.
Because the DUNGS Rp 1/2 flange DU215790 is designed to match the multibloc’s flange pattern, it preserves the compact layout and safety approvals. The integrated test port lets service personnel check manifold pressure without adding extra tees or fittings in tight mechanical rooms.
Ovens, dryers, and process heaters
Industrial ovens, kilns, paint booths, and drying lines frequently use DUNGS combustion systems. On smaller capacity lines, the DUNGS Rp 1/2 flange DU215790 is a logical fit. For example, a bakery oven may use a DUNGS MB 407 multibloc with 1/2" connections.
Here, the DUNGS Rp 1/2 flange DU215790:
- Connects the oven’s gas inlet pipe to the multibloc.
- Provides a convenient pressure test point at the burner inlet.
- Simplifies removal of the gas train for major service.
Consistent pressure and reliable sealing are key for stable oven temperatures, and the DUNGS Rp 1/2 flange DU215790 supports that by preventing leaks and pressure drops at the connection point.
Safety shutoff valve assemblies
Safety shutoff valves (SSOVs) are mandatory on most fuel gas systems. When you use DUNGS DMV dual valves, the DUNGS Rp 1/2 flange DU215790 typically sits on both inlet and outlet, adapting to field piping on either side.
In these safety-critical assemblies, the DUNGS Rp 1/2 flange DU215790 must be mechanically secure, leak-free, and easy to inspect. If a valve needs replacement, you can unbolt the flanges and remove the DMV without cutting pipe—another reason designers like this modular approach.
Maintenance Best Practices for the DUNGS Rp 1/2 Flange DU215790
Even with rugged components like the DUNGS Rp 1/2 flange DU215790, long-term reliability depends on good maintenance habits. Fortunately, flange maintenance is simple and fits easily into typical gas train inspection routines.
Here are best practices to keep your DUNGS Rp 1/2 flange DU215790 working reliably:
- Inspect regularly for leaks and damage. During scheduled inspections, visually check the flange, bolts, and surrounding area. Use a leak detection spray around the DUNGS Rp 1/2 flange DU215790 to confirm gas-tightness.
- Replace O-rings and gaskets when disturbed. Whenever the flange is removed for service, plan to replace the seal. Reusing a compressed O-ring around the DUNGS Rp 1/2 flange DU215790 can lead to small leaks, especially after further thermal cycling.
- Monitor bolt condition and torque. Confirm that bolts retaining the DUNGS Rp 1/2 flange DU215790 are not corroded or loose. Retorque them if recommended in the maintenance manual, but avoid over-tightening.
- Keep the test port clean and sealed. After every pressure check, re-tighten the plug on the DUNGS Rp 1/2 flange DU215790 and confirm there are no leaks. Replace any damaged small O-rings or washers associated with the plug.
- Avoid mechanical stress from misaligned piping. If the connected pipework is forcing the DUNGS Rp 1/2 flange DU215790 or valve body out of alignment, correct the pipe supports or routing. Flanges are not meant to act as structural supports for misaligned pipe.
- Use only genuine accessories. When replacing the DUNGS Rp 1/2 flange DU215790, its bolts, or its seals, choose genuine or equivalent-specified parts. That keeps the assembly within the conditions used during certification testing.
By following these practices, you help ensure that the DUNGS Rp 1/2 flange DU215790 remains a quiet but dependable part of your safety chain, rather than a hidden risk.
Why the DUNGS Rp 1/2 Flange DU215790 Matters in Modern Gas Trains
In complex combustion systems, it is tempting to focus only on major items like burners, controllers, or PLCs. Yet small parts like the DUNGS Rp 1/2 flange DU215790 carry a surprising amount of responsibility: they hold the pipework together, keep the system gas-tight, and support routine testing and maintenance.
A few key reasons the DUNGS Rp 1/2 flange DU215790 matters so much:
- It preserves the approvals and pressure ratings of DUNGS valves and regulators.
- It provides an integrated pressure test point exactly where technicians need it.
- It enables modular assembly and quick service, reducing downtime.
- It supports global standards by matching ISO 7-1 / EN 10226 threads and EN 161-based system designs.
From design through maintenance, choosing the correct flange type—and installing it correctly—directly influences system safety. When you specify the DUNGS Rp 1/2 flange DU215790, you’re choosing a connector that has been engineered and tested specifically for use on DUNGS gas control equipment.
Related Product Collections for Your Gas Train Design
If you’re working with the DUNGS Rp 1/2 flange DU215790, you’re likely building or upgrading a gas train. These related collections from Industrial Electrical Warehouse make it easier to source compatible components:
- DUNGS Gas Safety & Control Components ➜
Explore a range of genuine DUNGS products including gas valves, multibloc assemblies, pressure switches, and accessories that pair seamlessly with the DUNGS Rp 1/2 flange DU215790 for safe, compliant gas trains. - Ball Valve Collection ➜
Browse isolation and shutoff ball valves suitable for gas and industrial applications. These valves complement the DUNGS Rp 1/2 flange DU215790 when you need reliable manual shutoff points before or after automated gas controls. - Gas Hoses & Flexible Connectors ➜
Find flexible gas hoses and connectors that help you bridge fixed pipework and equipment, reducing stress on the DUNGS Rp 1/2 flange DU215790 and nearby components while maintaining safe, leak-tight connections.
Conclusion: Putting the DUNGS Rp 1/2 Flange DU215790 to Work in Your System
If you build, maintain, or upgrade gas trains that use DUNGS valves and regulators, the DUNGS Rp 1/2 flange DU215790 is more than just a small accessory. It is a key link that:
- Bridges your 1/2" BSP pipework to certified DUNGS devices.
- Maintains the gas train’s pressure rating and safety approvals.
- Simplifies commissioning thanks to its integrated test port.
- Supports modular layouts that are easy to service and expand.
By understanding how the DUNGS Rp 1/2 flange DU215790 is specified, installed, and maintained, you can design cleaner gas trains, troubleshoot more efficiently, and keep your combustion systems running safely over the long term.
When you’re ready to review technical details, check availability, or match it with compatible valves and regulators, take a moment to visit the product page for the DUNGS Rp 1/2 flange DU215790 on our site. Exploring the product specs alongside your system requirements can help you choose the right combination of DUNGS components for a safer, more reliable gas train.
