Valve Type & Models
- Flanged double-regulating and commissioning valve.
- Model 4218 GF with PN16 pressure rating.
- Model 4220 GF with PN25 pressure rating.
- Suitable for balancing, measuring, regulating, and shut-off duties.
Flanged Commissioning Valve
HERZ STRÖMAX-GF 4218 Commissioning Valve
4218 GF Series — Cast Iron PN16 Flanged Balancing Valve
HERZ STRÖMAX-GF 4218 Commissioning Valve from HERZ Armaturen is a heavy-duty flanged double-regulating and shut-off valve designed for accurate flow control, differential-pressure measurement, and hydraulic balancing in heating and chilled-water systems. Its cast-iron EN-GJL-250 construction, PN16 rating, linear flow characteristic, digital preset indicator, two measuring points, and triple EPDM O-ring spindle sealing support repeatable commissioning across large hydronic, district-energy, and industrial process-water networks.
Manufactured by
HERZ Armaturen
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HERZ STRÖMAX-GF 4218 Commissioning Valve
Review the confirmed product information, including construction, operating conditions, flow-control features, benefits, and hydronic-system applications.
HERZ STRÖMAX-GF 4218 Commissioning Valve from HERZ Armaturen is a heavy-duty flanged double-regulating valve designed for accurate flow control, hydraulic balancing, differential-pressure measurement, and shut-off duties in heating and chilled-water systems.
The product family includes the 4218 GF PN16 version and the 4220 GF PN25 version, supporting selection according to the operating-pressure requirements of the hydronic installation.
Its cast-iron construction, EPDM-coated valve cone, non-rising spindle, and triple EPDM O-ring sealing system support dependable operation in large commercial, industrial, and district-energy networks.
Two integrated measuring points allow differential-pressure monitoring and flow verification, while the digital preset indicator supports accurate and reproducible adjustment during initial commissioning and subsequent system checks.
Body & Internal Components
- Cast-iron body manufactured from EN-GJL-250 according to EN 1561.
- Grey cast-iron upper section for the specified nominal size range.
- Brass spindle for DN50 to DN100 versions.
- Stainless-steel spindle for DN125 to DN500 versions.
- Cast-iron valve cone with EPDM coating.
Pressure, Temperature & Media
- Nominal pressure options: PN16 or PN25.
- Operating temperature range from -10°C to +110°C.
- Suitable for water systems.
- Suitable for water-glycol mixtures containing approximately 25% to 50% glycol.
Connections & Installation
- Flanged connections according to EN 1092-2.
- Installation is possible in different orientations.
- The indicated flow direction must be observed during installation.
- Suitable for large-diameter hydronic pipe systems.
Balancing & Measurement
- Linear flow characteristic according to the referenced BS 7350 technical standard.
- Two ¼-inch measuring ports using the HERZ 0284 test point series.
- Compatible with suitable HERZ differential-pressure measuring devices.
- Digital preset indicator for clear valve adjustment.
Sealing & Protective Coating
- Triple EPDM O-ring spindle sealing.
- Non-rising spindle construction.
- Lead-free and chromate-free epoxy coating.
- Approximate coating thickness of 100 μm.
Accurate Flow Control
The linear valve characteristic and integrated measuring points support precise flow adjustment and hydraulic balancing.
Reproducible Presetting
The digital preset indicator allows the selected valve position to be read, recorded, and restored during later system checks.
Maintenance-Free Spindle Sealing
The triple EPDM O-ring sealing arrangement supports dependable spindle operation with limited maintenance requirements.
Corrosion-Resistant Protection
The lead-free and chromate-free epoxy coating protects the cast-iron construction and supports long service life.
Clear Preset Indication
The protected digital display provides a clear indication of the selected preset value during commissioning.
Simple Flow Verification
Integrated test points support straightforward differential-pressure measurement using compatible HERZ measuring equipment.
Reliable Shut-Off Performance
The EPDM-coated valve cone supports tight sealing while retaining the valve's regulating and commissioning functions.
Large-System Compatibility
Flanged construction and broad nominal-size applicability support use in large commercial, industrial, and district-energy networks.
The HERZ STRÖMAX-GF 4218 is intended for large hydronic systems requiring flanged flow regulation, commissioning, differential-pressure measurement, and hydraulic balancing.
Heating-Water Systems
Heating-water distribution circuits requiring repeatable presetting, flow adjustment, and hydraulic balancing.
Chilled-Water Networks
Chilled-water installations requiring controlled flow, differential-pressure monitoring, and commissioning.
Heating & Cooling Networks
District heating and cooling systems requiring robust flanged valves for large distribution circuits.
Process-Water Regulation
Industrial process-water and water-glycol circuits requiring accurate balancing and controlled system flow.
Energy Centres, Risers & Loops
Energy centres, building risers, and main distribution loops requiring measurable and reproducible flow adjustment.
Building Hydraulic Balancing
Commissioning and hydraulic balancing of commercial and industrial building systems using integrated measuring points and preset indication.
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