Body & Internal Components
- Ductile-iron body and bonnet manufactured from EN-JL 1050.
- EPDM-coated ductile-iron disc.
- Stainless-steel stem manufactured from AISI 410.
- Non-rising stem construction.
Flanged Commissioning Valve
HERZ STRÖMAX-GF 4218GF Commissioning Valve
Ductile Iron PN25 Double-Regulating Balancing Valve
HERZ STRÖMAX-GF 4218GF Commissioning Valve from HERZ Armaturen is a flanged double-regulating valve designed for accurate hydraulic balancing and flow verification in high-pressure HVAC and industrial water systems. Its robust ductile-iron construction, PN25 rating, linear flow characteristic, mechanical preset indicator, and two test points support reliable commissioning across large heating, cooling, district-energy, and process-water networks.
Manufactured by
HERZ Armaturen
Technical Downloads
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HERZ STRÖMAX-GF 4218GF Commissioning Valve
Review the confirmed product information, including construction, pressure conditions, balancing features, benefits, and large-scale hydronic applications.
HERZ STRÖMAX-GF 4218GF Commissioning Valve from HERZ Armaturen is a flanged double-regulating valve designed for accurate hydraulic balancing and flow adjustment in high-pressure heating, cooling, and industrial water systems.
Its ductile-iron body and bonnet provide the strength required for large commercial and industrial installations, while the PN25 pressure rating supports demanding hydronic operating conditions.
The valve incorporates a non-rising stainless-steel stem, EPDM-coated ductile-iron disc, preset dial indicator, and two integrated test points for differential-pressure measurement and flow verification.
Flanged EN 1092-2 connections and a size range from DN65 to DN300 support installation in central HVAC plants, district energy networks, process-cooling systems, and industrial fluid circuits.
Pressure & Temperature
- Nominal pressure rating: PN25.
- Maximum working pressure: 25 bar.
- Shell testing pressure: 37.5 bar.
- Seat testing pressure: 27.5 bar.
- Operating temperature range from -10°C to +120°C.
Connections, Sizes & Media
- Flanged connections according to EN 1092-2.
- Available in nominal sizes from DN65 to DN300.
- Suitable for water systems.
- Suitable for water-glycol mixtures containing up to 50% glycol.
Balancing, Sealing & Measurement
- Linear flow characteristic.
- Mechanical dial indicator for repeatable presetting.
- Two integrated test points for differential-pressure measurement.
- Graphite, asbestos-free stem packing.
High-Pressure Operation
The PN25 design supports balancing duties in hydronic systems operating under demanding pressure conditions.
Robust Ductile-Iron Construction
The ductile-iron body, bonnet, and coated disc support long-term use in large HVAC and industrial installations.
Repeatable Presetting
The mechanical dial indicator supports clear, repeatable adjustment during initial commissioning and later system verification.
Reliable Sealing
The EPDM-coated disc and graphite stem packing support tight valve operation and reduced internal leakage.
Simple Flow Verification
Two integrated test points allow differential-pressure measurement using compatible HERZ measuring instruments.
Large-System Compatibility
The DN65–DN300 size range and flanged construction support central plants, district systems, and industrial fluid networks.
The HERZ STRÖMAX-GF 4218GF is intended for large hydronic and industrial systems requiring flanged commissioning, preset flow adjustment, and differential-pressure-based balancing.
High-Pressure Chilled-Water Circuits
Chilled-water distribution systems requiring accurate commissioning and hydraulic balancing under high operating pressures.
High-Pressure Hot-Water Circuits
Central hot-water installations requiring controlled flow adjustment across large heating networks.
Heating, Cooling & Process Plants
District energy plants and process-cooling systems requiring durable flanged balancing valves.
Industrial Fluid Networks
Industrial water and water-glycol networks requiring PN25 operation and repeatable flow adjustment.
HVAC Plantrooms
Commissioning and balancing duties in central HVAC plantrooms using integrated test points and preset indication.
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