Body & Connections
- DZR copper-alloy body, CW602N, according to EN 12420.
- DZR copper-alloy end connections with internal threads according to ISO 7-1.
- Nominal size range from DN15 to DN50.
Two-Port Control Ball Valve
HERZ DZR Two-Port Control Ball Valve
HERZ DZR Two-Port Control Ball Valve — 2117 Series Linear Flow Control
HERZ DZR Two-Port Control Ball Valve from HERZ Armaturen is designed for continuous regulation of hot and cold water, air, and water-glycol mixtures in closed-circuit HVAC and hydronic systems. Its dezincification-resistant copper-alloy construction, V-shaped ball bore, PTFE seat, and double EPDM O-ring spindle sealing support precise linear flow control, tight shutoff, and low-torque operation.
Manufactured by
HERZ Armaturen
HERZ DZR Two-Port Control Ball Valve
Review the confirmed product information, including description, features, benefits, and applications.
The HERZ DZR Two-Port Control Ball Valve, Series 2117, from HERZ Armaturen is a linear-characteristic control valve designed for continuous regulation of hot and cold water or air in closed-circuit systems.
Constructed from dezincification-resistant copper alloys, the valve provides corrosion resistance and long-term operational reliability in demanding HVAC and hydronic environments.
Its V-shaped, precision-machined ball bore provides accurate flow control and a linear response characteristic. PTFE seats, EPDM O-rings, and a double O-ring spindle sealing arrangement support tight shutoff, low operating torque, and leak-resistant operation.
The valve is engineered for smooth actuation with torque requirements below 8 Nm at nominal voltage. It supports integration with HERZ electric actuators in 2/3-point and modulating versions. An optional HERZ manual handle, model 1 2100 90, can be installed across sizes DN15 to DN50.
Ball & Sealing
- DZR copper-alloy ball with V-shaped bore.
- Chrome-plated and micro-finished ball surface.
- PTFE ball seat with EPDM O-ring.
- DZR copper-alloy spindle, CW614N.
- Double EPDM O-ring spindle sealing.
- PTFE spindle seat.
Pressure & Temperature
- Nominal pressure PN40 for sizes DN15 to DN25.
- Nominal pressure PN25 for sizes DN32 to DN50.
- Operating temperature range from -10°C to +110°C.
Media & Operation
- Suitable for cold and hot water.
- Suitable for water-glycol mixtures with a maximum glycol concentration of 50%.
- Designed for automated operation with compatible HERZ electric actuators.
- Optional manual operation using the HERZ handle.
Accurate Flow Control
The V-shaped ball bore provides accurate linear flow control for efficient system regulation.
Reliable Shutoff
The precision-machined chrome-plated ball and PTFE sealing system support reliable and tight shutoff.
Low Operating Torque
Low torque requirements help reduce actuator wear and operating energy demand.
Corrosion Resistance
DZR copper-alloy construction supports extended service life in aggressive water conditions.
Automated or Manual Operation
The compact design supports both automated control and optional manual operation.
Wide Control Ratio
A control ratio of 500:1 supports precise modulation across varying system loads.
Easy Retrofit
Standardized HERZ actuators and handles support straightforward retrofit and operating flexibility.
Leak-Resistant Operation
Double O-ring spindle sealing supports durable and leak-resistant operation.
The HERZ DZR Two-Port Control Ball Valve is designed for closed-loop water systems requiring precise linear flow control in HVAC, hydronic, building automation, and district energy applications.
Heating, Ventilation & Air Conditioning
HVAC installations requiring controlled regulation of heating or cooling water flow.
Heating & Cooling Circuits
Hydronic heating and cooling circuits requiring precise, repeatable control.
District Energy & Building Automation
District energy networks and building automation systems using compatible HERZ electric actuators.
Chilled & Hot Water Circuits
Water-based closed-loop systems carrying chilled or hot water.
Glycol-Based Applications
Systems using water-glycol mixtures with glycol concentrations of up to 50%.
Commercial, Industrial & Residential Use
Precise flow-control applications across commercial, industrial, and residential installations.
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