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DA 516, DAF 516

These compact differential pressure controllers for heating and cooling systems are particularly effective in situations requiring high temperatures and/or pressure drop. They can be used both on the primary and secondary side in district heating and comfort cooling systems. Rust protection is assured thanks to the electrophoretically painted ductile iron body.

Product Information

Differential pressure controller with adjustable set-point

These compact differential pressure controllers for heating and cooling systems are particularly effective in situations requiring high temperatures and/or pressure drop. They can be used both on the primary and secondary side in district heating and comfort cooling systems. Rust protection is assured thanks to the electrophoretically painted ductile iron body.

Technical description

Application:

Heating and cooling systems with variable flow.
DA 516: Installation in return pipe.
DAF 516: Installation in supply pipe.

Functions:

Differential pressure control over the load.

Dimensions:

DN 15-150

Pressure class:

PN 25
DN 100-150: PN 16 and PN 25

Max. differential pressure (ΔpV):

1600 kPa = 16 bar

Setting range:

Δp over the load is adjustable within:
DN 15-125: 5-30 kPa, 10-60 kPa, 10-100 kPa or 60-150 kPa.
DN 150: 5-30 kPa, 10-60 kPa, 10-100 kPa, 60-150 kPa or 100-400 kPa.
Delivery setting:
DN 15-50: Maximum value (30, 60, 100 resp. 150 kPa).
DN 65-125: Midway min./max. value (~18, ~35, ~55, resp. ~105 kPa).
DN 150: Minimum value (5, 10, 10, 60 resp. 100 kPa).

Temperature:

Max. working temperature:
- with measuring points: 120°C
- without measuring points: 150°C
Min. working temperature: -10°C

Media:

Water and neutral fluids, water-glycol mixtures.

Material:

Valve body: Ductile iron EN-GJS-400
Diaphragms and gaskets: EPDM
Adjustment ring: DN 15-50 Ryton PPS, DN 65-125 R St 37-2 steel. (DN 150 has no adjustment ring)

Surface treatment:

Electrophoretic painting.

Marking:

TA, DN, PN, Material, Kvs, Δp and flow direction arrow.

Threads:

DN 15-50: According to ISO 228.

Flanges:

DN 15-50: According to EN-1092-2:1997, type 16.
DN 65-150: According to EN-1092-2:1997, type 21.

The products, texts, photographs, graphics and diagrams in this document may be subject to alteration by IMI Hydronic Engineering without prior notice or reasons being given. For the most up to date information about our products and specifications, please visit www.imi-hydronic.com.

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