✅ Self-operated, proportional control
✅ Rolling diaphragm actuator for accurate pressure adjustment
✅ Available in nominal diameters DN15 - DN150
✅ Adjustable inlet pressure ranges from 0.2 to 16 bar
✅ Pressure-balanced stainless steel bellows for precise regulation
✅ Optional PTFE soft-seated plug for enhanced sealing (max 200°C)
✅ Low-noise operation with optional flow divider
Technical Specifications
Valve Types & Configurations
- Excess pressure regulator with diaphragm actuator UDA
- Straight-through design for minimal pressure loss
- Bellows-sealed spindle for improved reliability
Material Options & Pressure Ratings
| Model | Nominal Pressure (PN) | Material | Nominal Diameter (DN) | Inlet Pressure Range (bar) |
|---|---|---|---|---|
| 12.705 | PN16 | EN-JL1040 | DN15-150 | 0.2 - 16 |
| 22.705 | PN16 | EN-JS1049 | DN15-150 | 0.2 - 16 |
| 23.705 | PN25 | EN-JS1049 | DN15-150 | 0.2 - 16 |
| 34.705 | PN25 | 1.0619+N | DN15-150 | 0.2 - 16 |
| 35.705 | PN40 | 1.0619+N | DN15-150 | 0.2 - 16 |
Other materials and custom versions available upon request.
Flow Performance & Dimensions
| DN (Size) | Kvs Value (m³/h) | Seat-Ø (mm) | Travel (mm) | Face-to-Face Dimension (mm) |
|---|---|---|---|---|
| DN15 | 3.2 | 18 | 4 | 130 |
| DN20 | 5.0 | 22 | 5 | 150 |
| DN25 | 8.0 | 25 | 6 | 160 |
| DN32 | 12.5 | 32 | 8 | 180 |
| DN40 | 20.0 | 40 | 8 | 200 |
| DN50 | 32.0 | 50 | 10 | 230 |
| DN65 | 50.0 | 65 | 11 | 290 |
| DN80 | 80.0 | 80 | 13 | 310 |
| DN100 | 125.0 | 100 | 16 | 350 |
| DN125 | 190.0 | 125 | 19 | 400 |
| DN150 | 280.0 | 150 | 22 | 480 |
Shut-off Class: Leakage Class I (DIN EN 1349 / DIN EN 60534-4) – ≤ 0.05% of Kvs value
Pressure & Temperature Ratings
| Material | PN Rating | Temperature Range | Max Operating Pressure (bar) |
|---|---|---|---|
| EN-JL1040 | PN16 | -10°C to 120°C | 16 |
| EN-JS1049 | PN16 | -10°C to 250°C | 16 |
| EN-JS1049 | PN25 | -10°C to 250°C | 25 |
| 1.0619+N | PN25 | -60°C to 450°C | 25 |
| 1.0619+N | PN40 | -60°C to 450°C | 40 |
Note: For temperatures above 250°C, a water seal pot must be installed to protect the diaphragm actuator.
Actuation & Control Mechanism
Diaphragm Actuator – UDA 40 to UDA 400
- Rolling diaphragm for sensitive pressure control
- Spring-loaded mechanism for self-regulating pressure adjustment
- Actuator sizes:
- UDA 400: Large capacity (high control accuracy)
- UDA 250 / 160 / 80 / 40: Compact versions for various pressure ranges
- Diaphragm materials:
- EPDM (-40°C to +110°C) – Suitable for water, steam, and gases
- NBR (-40°C to +100°C) – Suitable for oils and neutral gases
Applications
✔ Pressure regulation in steam & condensate systems
✔ Gas and vapor regulation in pipelines
✔ Pump protection by preventing excessive pressure buildup
✔ Overpressure prevention in heat exchangers and boiler systems
✔ Control of pressure fluctuations in industrial processes
Installation & Operation
- Designed for simple, inline installation
- Pressure setting easily adjustable via spring tension
- Available with DIN EN 1092-1/-2 flanges
- Optional flow restrictor for noise reduction
