LESER Product Overview
Click on one of the
valves for details
valves for details
-
S&R
Safety valves to meet the requirements of local codes and standards such as for heating systems (TRD 721).
Advantages
- In-line relief valves directly integrated into the pipe line
- Standardized valves for short delivery times
Technical Specifications
| Nominal Diameter at Inlet | DN 15 - DN 150 | 1/2" - 6" |
| Actual Orifice Diameter d0 | 15 mm - 125 mm | 0.591 in - 4.921 in |
| Actual Orifice Area A0 | 177 mm² - 12.272 mm² | 0.274 in² - 19.022 in² |
| Pressure | 0.5 bar - 40 bar | 7.3 psig - 580 psig |
| Temperature (according to DIN EN) | -85 °C to 450 °C | -121 °F to 752 °F |
| Body Material | 0.6025, 0.7043, 1.0619, 430F | Cast steel, Ductile Gr. 60-40-18, SA 216 WCB, 1.4104 |
| Valve connections | Flange in accordance with DIN, threads |
| Bellows | Elastomer, stainless steel |
Approvals
Industries
- Heating and Air Conditioning
Valve Types
-
Type 532, 534
Proportional in-line safety valve
DN 15 - DN 150 (1/2" - 6") -
Type 440
Flanged safety valves for heating plants up to 120 °C acc. to DIN 4751 part 2
DN 20 - DN 150 (3/4" - 6") -
Type 424
Safety valves for steam boilers up to 1 bar g
DN 25 - DN 150 (1" - 6") -
Type 460
Threaded safety valves for heating plants up to 120 °C acc. to DIN 4751 part 2
DN 15 - DN 20 (3/4" - 1") -
Type 612
Pressure reducing valve with bellows
DN 15 - DN 100 (1/2" - 4")
