S&R

The S&R product group offers safety valves for heating technology. These comply with the standards DIN EN ISO 4126-1, DIN 4751 part 2 as well as TRD 721.

Standardized heating safety valve
Suitable for steam generators up to 1 bar overpressure
Suitable for water heating systems up to 120 °C

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S&R Safety Valve from LESER

Technical data S&R Safety valves

Set pressure		0.5 - 10 barg \| 7.3 - 145 psig
Temperature		-45 - 150 °C \| -49 - 302 °F
Capacity		orifice D to Q
Connections DIN EN 1092		DN 25 to DN 150
Body material		Carbon steel, Grey cast iron

Thermoquell Brner GmbH Co

HTT energy GmbH

GEA TDS GmbH

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Thermoquell Brner GmbH Co

HTT energy GmbH

GEA TDS GmbH

Valve Types

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S&R Safetys valves

S&R Safety Valve from LESER

Safety valve for steam generator up to 1 bar overpressure

DN 25 - DN 150 | NPS 1 - NPS 6

0.5 - 1 bar | 7.2 - 14.5 psig

S&R Safety Valve from LESER

Flanged safety valve for water heating systems up to 120 °C according to DIN 4751 part 2

DN 20 - DN 150 | NPS 3/4 - NPS 6

1 - 10 bar | 14.5 - 145 psig

LESER S&R Safety Valve Type 460

Threaded safety valve for water heating systems up to 120 °C according to DIN 4751 part 2

DN 15 - DN 20 | NPS 3/4 - NPS 1

1 - 10 bar | 14.5 - 145 psig

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S&R Catalog

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Calculation of safety valves with LESER-Valvestar

Sizing and selection

Sizing and selection of your LESER Safety valve with VALVESTAR^® - The Sizing Program

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