Materials
- Body: cast iron EN-GJL 250.
- Disc: stainless steel 1.4408 (DN50–DN300); 1.4301 / AISI 304 (DN350–DN600).
- Stem: stainless steel ASTM A276 Type 316 (DN50–DN300); 1.4021 / AISI 420 (DN350–DN600).
- Seat: EPDM.
Gear Operated Butterfly Valve
HERZ 4219 ZF Wafer Gear Butterfly Valve
4219 ZF Series — Cast Iron Wafer Type, DN50–DN600
HERZ 4219 ZF with gearbox from HERZ Armaturen is a cast iron wafer type butterfly valve for controlled isolation and regulation in large-diameter HVAC and water systems, available from DN50 to DN600.
Manufactured by
HERZ Armaturen
HERZ 4219 ZF Wafer Gear Butterfly Valve
Review the confirmed product information, including description, features, benefits, and applications.
The HERZ 4219 ZF Gear Operated Butterfly Valve from HERZ Armaturen is a robust wafer valve for flow regulation and isolation in HVAC and water systems. A worm gearbox provides smooth, controlled operation, and the range covers DN50 to DN600.
Built from cast iron (EN-GJL 250) with EPDM sealing and a stainless-steel disc, it provides long-term corrosion resistance and reliable shut-off. The epoxy-coated blue body supports extended durability in hydronic networks.
Pressure & Temperature
- Pressure rating: PN16.
- Temperature range: -20°C to +110°C.
- Medium: water and water/glycol mixtures up to 50%.
Connection & Sizes
- Wafer type, flanges to EN 1092-2.
- PN10 and PN16 flanges for DN50–DN150; PN16 for DN200 and above.
- Sizes DN50 to DN600.
Operation & Coating
- Worm gearbox with handwheel.
- Operating torque: 20–1035 Nm depending on size.
- Kv values from 10,421 to 27,502 m³/h for DN350–DN600.
- Blue epoxy coating; electrostatic powder epoxy for DN350–DN600.
Sizes, Dimensions & Flow
Dimensions in mm. L = face-to-face length. Kv values are published for DN350–DN600 only.
| DN | L (mm) | Weight (kg) | Torque (Nm) | Kv (m³/h) |
|---|---|---|---|---|
| 50 | 43 | 8.3 | 20 | — |
| 65 | 46 | 8.5 | 20 | — |
| 80 | 46 | 9.2 | 25 | — |
| 100 | 52 | 10.8 | 50 | — |
| 125 | 56 | 12.8 | 50 | — |
| 150 | 56 | 14.6 | 90 | — |
| 200 | 60 | 19.7 | 150 | — |
| 250 | 68 | 29.1 | 250 | — |
| 300 | 78 | 39.4 | 350 | — |
| 350 | 78 | 59.2 | 510 | 10,421 |
| 400 | 102 | 84.9 | 630 | 12,146 |
| 450 | 114 | 103.6 | 690 | 16,863 |
| 500 | 127 | 150 | 860 | 22,795 |
| 600 | 154 | 193 | 1035 | 27,502 |
Smooth Gear Control
High-torque gearbox for smooth, controlled operation.
High Flow Capacity
Large flow capacity and low head loss for large-diameter pipework.
Durable Construction
Cast iron body and stainless-steel disc for durable, long-term operation.
Corrosion Protection
Corrosion-resistant epoxy coating supports a long service life.
Automation Ready
Can be used with gearboxes or actuators for automated operation.
HERZ 4219 ZF with gearbox is suitable for large pipework isolation and control in building services, cold water, and hot water systems.
HVAC & District Energy Networks
HVAC mains and district energy networks with large pipe diameters.
Process Water Systems
Industrial and process water systems.
Pump Isolation
Plant room installations and pump isolation.
Control & Isolation
Large pipework control and isolation duties.
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