Kromschroder Spare Parts: Buyer's Guide to Burner Controls, Regulators & Valves

What Is Kromschroder and Why Spare Parts Matter

Kromschroder is a specialist manufacturer of combustion and gas-handling components for industrial burners, boilers and heating systems. Their product range spans pressure regulators, safety valves, solenoid switches, electrodes and control modules—all critical to safe, efficient burner operation.

Genuine OEM spare parts ensure compliance with safety standards (EN 88, EN 1854, EN 746-2), maintain warranty coverage and prevent costly downtime. Counterfeit or mismatched components can compromise pressure control, ignition reliability and gas safety certification.

Kromschroder Product Categories in the 3G Electric Catalog

3G Electric carries 180 Kromschroder spare parts across five main categories:

• Burner Controls (173 parts): The largest category, including regulators, pressure switches, solenoid valves, filters and safety devices.
• Gas Regulation (2 parts): Specialised solenoid valves for gas flow control.
• Valve/Solenoid (2 parts): Fast-acting and slow-opening safety valves.
• Electrodes (2 parts): Ignition and flame-detection electrodes.
• Servo Motors (1 part): Modulating actuators for burner control.

Core Product Lines: Regulators, Switches & Valves

Gas Pressure Regulators

Kromschroder regulators maintain stable gas pressure to the burner, compensating for upstream supply fluctuations. Two main series are stocked:

Gas Types Supported: Natural gas, propane, butane, biogas, town gas. All GDJ and VGBF models comply with EN 746-2 installation standards. Air-version regulators (suffix …L) are also available for applications requiring air pressure control.

Installation Tip: VGBF regulators require a minimum 20 mm clearance to walls for diaphragm operation. GDJ models use threaded Rp connections to ISO 7-1; VGBF models use flange connections to ISO 7005.

Pressure Switches

Pressure switches monitor gas and air pressure, triggering burner shutdown if pressure falls outside safe limits. Kromschroder DG series switches carry SIL 3 / PLe safety ratings and multiple international certifications:

DG switches are used for both gas and air pressure control. The model suffix (e.g., /3, /6, /9) indicates the pressure setpoint range; consult the product datasheet or contact 3G Electric for exact thresholds.

Solenoid Valves & Safety Valves

Fast-acting and slow-opening solenoid valves control gas flow during burner start and shutdown:

• Fast Gas EV VAS 232R/NW (SKU KRO06012): Rapid gas isolation on ignition failure. LED blue control indicator. Max upstream pressure 500 mbar, rated 7 psig.
• Slow Gas VAS 365R/LW (SKU KRO06044): Gradual gas ramp-up to prevent flame disturbance. Blue LED indicator. Max upstream pressure 500 mbar.

Both valves are designed for low-pressure gas systems (≤ 500 mbar) and feature integrated status indicators for diagnostic purposes.

Gas Filters

Kromschroder gas filters protect regulators and valves from particulate contamination. All models use polypropylene foam elements (50 µm) and comply with DIN 3386:

Filter elements should be inspected and replaced annually or when pressure drop exceeds the design limit. Housing material is typically AlSi (aluminium-silicon alloy) for corrosion resistance.

How to Identify the Correct Part Number

Kromschroder part numbers encode critical information. Follow these steps to ensure you order the right spare:

1. Confirm the OEM model on your burner: Check the burner's control panel, wiring diagram or nameplate for the exact Kromschroder component model (e.g., GDJ 20R04/0, DG 50UG/4).
2. Verify gas type and pressure rating: Match the regulator or valve to your fuel (natural gas, propane, biogas) and system pressure (e.g., 1 bar, 500 mbar). Mismatched pressure ratings can cause unsafe operation.
3. Check connection type: Confirm whether the component uses threaded connections (Rp to ISO 7-1) or flange connections (PN 16 to ISO 7005). Adapters are available but OEM-matched connections are preferred.
4. Note the safety standard: Ensure the replacement part meets the same certification (EN 88, EN 1854, EN 746-2) as the original. This is mandatory for warranty and compliance.
5. Cross-reference the 3G Electric SKU: Once you have confirmed the model, locate the corresponding SKU in the 3G Electric catalog (e.g., KRO01104 for GDJ 20R04/0). This ensures you receive a genuine Kromschroder part.
6. Request a quotation: Contact 3G Electric with the SKU and application details. Lead time and availability will be confirmed at quotation.

Compatibility & Installation Standards

Kromschroder components are designed to work together as a system. Key compatibility rules:

• Pressure Regulator + Pressure Switch: The regulator outlet pressure must fall within the switch's setpoint range. Consult the DG switch datasheet for exact thresholds (e.g., DG 150U/3 vs. DG 150U/6).
• Gas Filter Placement: Install the filter upstream of the regulator to protect the diaphragm and valve seat. Check the filter's max pressure rating—GFK 32R40/6 is rated 0.4 bar, while GFK 20R40/6 and GFK 65F60/6 are rated 1 bar.
• Solenoid Valve Voltage: The E6/G S8GMO solenoid valve (SKU GAZ60010) operates at 230V AC with a coil power of 760 VA. Ensure your control circuit supplies the correct voltage and power capacity.
• Installation Standards: All components must comply with EN 746-2 (gas burner installation) and EN 1854 (pressure switch safety). Regional regulations (e.g., AGA in North America, GOST-TR in Russia) may impose additional requirements.

Sourcing Genuine Kromschroder Spares Through 3G Electric

3G Electric is an authorised distributor of Kromschroder spare parts. All 180 components in the catalog are genuine OEM stock, not refurbished or third-party equivalents.

Ordering Process:

1. Identify the Kromschroder model and 3G Electric SKU using the product tables above.
2. Submit a quotation request via the 3G Electric website or contact the sales team directly.
3. Confirm lead time, pricing and delivery terms. 3G Electric handles customs clearance and logistics for worldwide shipment.
4. Upon receipt, verify the part number, serial batch and packaging seal to confirm authenticity.

Why Order Through 3G Electric: As an authorised distributor, 3G Electric guarantees genuine parts, technical support and warranty compliance. Direct OEM sourcing eliminates counterfeits and ensures compatibility with your burner system.

Frequently Asked Questions

What is the difference between GDJ and VGBF regulators?

GDJ regulators are compact, threaded-connection models suited to smaller burners and low-flow applications. VGBF regulators are larger, flange-mounted units with pre-pressure compensation diaphragms, designed for high-capacity systems requiring precise pressure control and no purge line. VGBF models offer higher accuracy and are preferred for industrial boilers.

Can I use a DG 50U/9 Z pressure switch in place of a DG 50UG/4?

Both switches meet EN 1854 and SIL 3 / PLe standards, but the model suffix indicates different pressure setpoint ranges. Substitution is only safe if the new switch's setpoint matches your system's design pressure. Always consult the datasheet or contact 3G Electric to confirm compatibility before swapping.

What does the "air version" (suffix …L) mean on a regulator?

Air-version regulators (e.g., GDJ…L) are calibrated to control air pressure instead of gas pressure. They are used in burner combustion air lines. Do not substitute an air-version regulator for a gas-version regulator, as the diaphragm and spring settings differ.

How often should I replace Kromschroder gas filter elements?

Polypropylene foam elements (50 µm) should be inspected annually and replaced if pressure drop exceeds design limits or if visible contamination is present. In high-dust environments, replacement may be required more frequently. Always use genuine Kromschroder elements to maintain system integrity.

What certifications do Kromschroder pressure switches carry?

DG series pressure switches are certified to EN 1854 (European standard), FM (Factory Mutual, North America), UL (Underwriters Laboratories, North America), AGA (American Gas Association) and GOST-TR (Russia/CIS). This multi-certification ensures compliance across most global markets and industrial applications.

Can I order Kromschroder parts directly from the manufacturer?

Kromschroder sells through authorised distributors like 3G Electric rather than direct to end-users. Ordering through 3G Electric ensures genuine stock, technical support and warranty coverage. Lead time and pricing are confirmed at quotation.

What is the minimum installation distance for VGBF regulators?

VGBF regulators require a minimum 20 mm clearance to walls to allow free diaphragm movement. Insufficient clearance can restrict the diaphragm's travel, degrading pressure control accuracy. Always follow the installation standard EN 746-2 when mounting regulators.

Does 3G Electric stock replacement coils for solenoid valves?

The 3G Electric catalog includes complete solenoid valve assemblies (e.g., VAS 232R/NW, VAS 365R/LW) and the E6/G S8GMO gas valve. For coil-only replacements or other component-level spares, contact 3G Electric to check availability and lead time.