Safety valves

Safety valves for heating, cooling and solar systems DN 15 – DN 50

For the safeguarding of thermostatically protected, closed-circuit water heating, cooling, and solar systems with supply temperatures of up to 200°C, for all static heights according to TRD 721, DIN 4751, SWKI HE301-01 and DIN EN 12828.

Technical SpecificationsSafety_valves_EN_low.pdf

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Features and Benefits

Easy selection, broad product portfolio

DSV...DGH and DSV...DGF valves can be supplied in 0,1 bar increments. Special versions in other materials such as stainless steel, or with a thermal resistance of up to 400°C, are available upon request.

According to standards

All valves are TÜV type approved and comply with the standards listed under Approvals.

High blow off rates

Enhanced lift and capacity thanks to a special valve construction.

Cleaning of seat possible

A fully detachable bonnet allows for easy cleaning of the gasket while leaving valve settings unchanged.

Applications

Heating, cooling and solar systems for building technology and industrial applications.

Functions

Protection of the maximum pressure on heat generators and systems.

Pressure

DSV...DGF: Max. admissible pressure, PS: 25 bar, Min. admissible pressure, PSmin: 0 bar,DSV...SOL: Max. admissible pressure, PS: 10 bar, Min. admissible pressure, PSmin: 0 bar

DSV...DGH Flanges (DN 40-50), DSV...F: Max. admissible pressure, PS: 16 bar, Min. admissible pressure, PSmin: 0 bar

DSV...DGH (DN 15-32): Max. admissible pressure, PS: 25 bar, Min. admissible pressure, PSmin: 0 bar

DSV...H: Max. admissible pressure, PS: 3 bar, Min. admissible pressure, PSmin: 0 bar

Temperature

Max. admissible temperature, TS: DSV...H, DSV...DGH: 120°C 1), DSV...SOL: 160°C, DSV...DGF: 200°C, DSV...F: 150°C 1) Materials are suitable for temperatures up to 160°C during the blow-off process.

Min. admissible temperature, TSmin: DSV...H, DGH, SOL: -10°C, DSV...DGF, DSV...F : -50°C

Media

DSV...DGH, DSV...DGF: Addition of antifreeze agent up to 50%.

DSV...F: Addition of antifreeze agent up to 100%.

DSV...H: Addition of antifreeze agent up to 30%.

Measurement accuracy

DSV...H:

Closing pressure tolerance: 0,5 bar

Open pressure tolerance: 0,5 bar

Selectable valves: psv = 2.5 and 3.0 bar

DSV...DGH:

Closing pressure tolerance: psv · 0,1 bar

Open pressure tolerance: psv · 0,1 bar

Selectable valves: psv from 1,0 to 25 bar in 0,5 bar (standard) and 0.1 bar (on request) increments.

DSV...SOL:

Closing pressure tolerance: psv · 0,2 bar and > 0,6 bar

Open pressure tolerance: psv · 0,1 bar and > 0,5 bar

Selectable valves: psv = 2, 3, 4, 6, 8 and 10 bar

DSV...F:

Closing pressure tolerance: psv · 0,2 bar and > 0,6 bar

Open pressure tolerance: psv · 0,1 bar and > 0,1 bar

Selectable valves: psv from 3 to 10 bar in 1,0 bar increments.

DSV...DGF:

Closing pressure tolerance: psv · 0,1 bar

Open pressure tolerance: psv · 0,1 bar

Selectable valves: psv from 1,0 to 16 bar in 0,5 bar (standard) and 0,1 bar (on request) increments.

Material

DSV...H, DSV...F, DSV...SOL:

Body: gunmetal. Internal parts: Brass. Spring: Spring steel with anti-rust protection.

DSV...DGH:

Body: gunmetal. Internal parts: Brass. Spring: Stainless steel.

DSV...DGH Flanges (DN 40-50):

Nodular graphite iron GGG, Colour beryllium.

DSV...DGF:

Body: gunmetal. Internal dry parts: Brass. Internal wetted parts: stainless steel. Spring: stainless steel.

Approvals

All safety valves featured in this datasheet have been officially certified and approved (D=Steam, G=Gases, H=Heating, SOL=Solar, F=Fluids). For details such as certificate numbers please refer to the applicable Declaration of Conformity.

Safety valves with sole approval code letters F, H, SOL are not allowed for installations according to SWKI HE301-01. Safety valves of the approval type DGF and DGH are to be used here.

Warranty

5-year warranty

The table below assists you in finding the relevant product based on its variant. For more details, please download the datasheet above.

Art. No.