DA 516Differential pressure controller

The DA 516 valve is part of TA’s Total Hydronic Balancing Concept, that includes everything

you need to balance a system. From balancing and radiator valves to measuring instruments,

balancing ready reckoners, courses and practical handbooks.

DA 516 is a differential pressure controller that keeps the differential pressure over the load constant, meaning accurate and stable modulating control, less risk of noise from control valves and easy balancing and commissioning. DA 516 has adjustable set-point, it is small and compact due to its inline design and is especially appropriate where high temperature and/or high pressure drop is needed, e.g. for primary side of district heating.

DN15-50

DN 65-125

DA 516Differential pressure controller

Technical description

Application:Heating and cooling systems with variable flow.

Functions:Differential pressure controlAdjustable Δp

Pressure class:DN 15 – 125: PN 25 (DN 65 – 125: PN 16 on request)

Max. differential pressure:1600 kPa = 16 bar

Temperature:Max. working temperature: 140°CMin. working temperature: -10°C

Setting range:Δp over the load is adjustable within 5-30 kPa, 10-60 kPa,10-100 kPa or 60-150 kPa.Delivery setting: Maximum value (30, 60, 100 resp 150 kPa).

Media:Water and neutral fluids, water-glycol mixtures.

Material:Valve body: Ductile iron EN-GJS-400-18LTDiaphragms and gaskets: EPDMAdjustment ring: DN 15-50 Ryton plastic, DN 65-125 R St 37-2steel.

Surface treatment:Electrophoretic painting.

Marking:TA-Regulator, DN, PN, GGG 40.3, Kvs, Δp and flow direction arrow.

Flanges:DN 15-50: According to EN-1092-2:1997, type 16.DN 65-125: According to EN-1092-2:1997, type 21.

For complete details of the DA 516 differential pressure controller with control function, see our catalog, www.tourandersson.cu.uk or contact your nearest TA office. Tour & Andersson retains the right to make changes to its products and specifications without prior notice.

Installation Note! The valve body cannot be dismounted.By incorrent handling, the controller may not work properly and safety problems may occur. The DA 516 must be installed in the return pipe. Flow direction is shown by arrow (11) on the valve’s identification plate (10). The best position is horizontal with the venting screws (2) pointing upwards. Installation of a strainer upstream of the valve is recommended. Connect capillary pipe (Δp+, copper Ø6x1), to the pipeline upstream of the load. In case of a horizontal pipeline connect the capillary pipe laterally to prevent air and dirt from entering. When filling, vent the body by using the venting screws (2). When soldering the valve must be protected from too high tem-perature. Turn the adjustment ring (5) clock-wise until stop and the nut (7) on the outlet side will be accessible. The differential pressure over the load can be measured by using the balancing valve STAD (MD60) and the balancing instrument TA-CBI or measuring instrument TA-CMI.

Capillary pipeBefore taking into operation, the capillary pipe must be installed. The connection (Ø6x1) is marked with Δp+. The other end of thecapillary pipe is connected to the balancing valve STAD (MD60).

Keeping the differential pressure over a control valve constant

Shunt groupDA 516 should be mounted downstream the control valve and STAD (MD60)/STAF (MDF3) may preferrably be mounted in the supply pipe.

Heat exchangerDA 516 should be mounted downstream the control valve and STAD (MD60)/STAF (MDF3) upstream the control valve, but downstream the heat exchanger. STAD (MD60)/STAF (MDF3) can be mounted in the supply pipe, but with a decreased valve authority as a consequense.

Tour & Andersson Ltd.Unit 3 Nimbus Park, Porz Avenue, Dunstable, Beds LU5 5WZ

Tel: +44(0)1582 866377. Fax: +44(0)1582 865655.www.tourandersson.co.uk

DA

516

UK

2006

.09

STAD (MD60)/STAF (MDF3)

STAD (MD60)/STAF (MDF3)