Materials
- Body: cast DZR brass (CC752S).
- Upper part and cone: DZR brass (CW602N).
- Spindle: brass (CW617N).
- Seal: EPDM.
- Handwheel: red, polyamide.
Non-Rising Spindle Globe Valve
HERZ STRÖMAX-D 4125 Non-Rising Spindle Globe Valve
4125 Series — Compact DZR Brass PN20 Shut-Off Valve
HERZ STRÖMAX-D 4125 from HERZ Armaturen is a compact DZR brass globe valve with non-rising spindle for HVAC and hydronic shut-off applications, suited to installations with limited space.
Manufactured by
HERZ Armaturen
HERZ STRÖMAX-D 4125 Non-Rising Spindle Globe Valve
Review the confirmed product information, including description, features, benefits, and applications.
The HERZ STRÖMAX-D (4125 Series) from HERZ Armaturen is a non-rising spindle globe valve designed for easy installation and space-limited systems. Constructed from cast DZR brass (CC752S), it offers high resistance to dezincification and corrosion.
Its double O-ring spindle seal and EPDM seat ensure long-term tightness, while the optional drain ports allow convenient system servicing. It operates up to 20 bar and 110°C, suitable for heating, cooling, and domestic water circuits.
Pressure & Temperature
- Nominal pressure: PN20.
- Operating temperature: -10°C to +110°C.
- Max. differential pressure (closed): 10 bar.
- Ethylene or propylene glycol mixtures of 25–50% permitted.
Connection & Draining
- BSP female threaded connections on both sides.
- Sizes DN15 to DN80 (½" to 3").
- Optional version with two bore holes for drain fittings (4125 AD).
Design & Installation
- Inclined body with non-rising spindle.
- Spindle sealing by elastic double O-ring.
- Flow direction indicated on the body.
- Any mounting position.
Sizes & Dimensions
Dimensions in mm. L = face-to-face length, H = installation height.
| DN | Connection (Rp) | L (mm) | H (mm) |
|---|---|---|---|
| 15 | ½ | 65 | 86 |
| 20 | ¾ | 75 | 92 |
| 25 | 1 | 90 | 105 |
| 32 | 1¼ | 110 | 118 |
| 40 | 1½ | 120 | 127 |
| 50 | 2 | 150 | 155 |
| 65 | 2½ | 180 | 205 |
| 80 | 3 | 210 | 226 |
Ideal for Confined Spaces
The non-rising spindle keeps the installation height constant, making the valve ideal for confined spaces.
Long-Term Corrosion Protection
The DZR brass body ensures long-term protection against dezincification and corrosion.
Maintenance-Free Sealing
Double O-ring spindle sealing supports maintenance-free, long-term tight operation.
Simpler Commissioning
The optional draining feature simplifies commissioning and system servicing.
Compact & Durable
Compact and durable construction for dependable shut-off in HVAC and water systems.
HERZ STRÖMAX-D 4125 is suitable for reliable shut-off of pipes in heating, cooling, and water systems, especially where installation space is limited.
Heating & Cooling Distribution Lines
Heating and cooling distribution lines requiring compact threaded shut-off valves.
Branch Isolation
Branch isolation in hydronic systems for servicing equipment and system sections.
Domestic Hot Water Systems
Building services and domestic hot water systems requiring DZR brass construction.
General Shut-Off Duty
General shut-off applications in HVAC networks where a non-rising spindle is preferred.
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