STAD BALANCING VALVES

Transcription

1 BAANCING BAANCING VAVES BAANCING VAVE The STAD balancing valve elivers accurate hyronic perfomance in an impressive range of applications. Ieally suite for use on the seconary sie in heating an cooling systems, an tap water systems. ANDWEE Equippe with a igital rea-out, the hanwheel ensures accurate an straightforwar balancing. Positive shut-off function for easy maintenance. SEF-SEAING MEASURING POINTS For simple, accurate balancing. AMETA CONSTRUCTION Dezincification resistant alloy that guarantees a longer valve lifetime, an lowers the risk of leakage.

2 BAANCING Technical escription Application: eating an cooling systems Tap water systems Functions: Balancing Pre-setting Measuring Shut-off Draining (optional) Dimensions: DN Pressure class: PN 20 Temperature: Max. working temperature: 120 C. For higher temperatures max. 150 C, please contact closest sales office. NOTE! DN with smooth ens max working temperature 120 C. Min. working temperature: -20 C Material: The valves are mae of AMETA Seat seal: Stem with EPDM O-ring Spinle seal: EPDM O-ring anwheel: Polyamie Smooth ens: Nipple: AMETA Sealing (DN 25-50): EPDM O-ring AMETA is the ezincification resistant alloy of TA. Marking: Boy: TA, PN 20/150, DN an inch size. anwheel: Valve type an DN. 2

3 BAANCING Female threas Threa length accoring to ISO7/1 With raining D DN D Kvs Kg = G1/2 = G3/ /09 G3/ ,47 0, /14 G1/ ,52 0, G3/ ,70 0, G ,70 0, G1 1/ ,2 1, G1 1/ ,2 1, G ,0 2,4 Female threas Threa length accoring to ISO7/1 Excl. raining (can be installe uring operation) D DN D Kvs Kg /09 G3/ ,47 0, /14 G1/ ,52 0, G3/ ,70 0, G ,70 0, G1 1/ ,2 1, G1 1/ ,2 1, G ,0 2,3 Smooth ens With raining ØD DN D Kvs Kg = G1/2 = G3/ / ,47 0, / ,52 0, ,70 0, ,70 1, ,2 1, ,2 2, ,0 3,2 = Flow irection Kvs = m 3 /h at a pressure rop of 1 bar an fully open valve. ) Can be connecte to smooth pipes by KOMBI compression coupling. See catalogue leaflet KOMBI. 3

4 BAANCING Smooth ens Excl. raining (can be installe uring operation) ØD DN D Kvs Kg / ,47 0, / ,52 0, ,70 0, ,70 1, ,2 1, ,2 1, ,0 3,1 With KOMBI compression couplings (not mounte) Excl. raining (can be installe uring operation) Da ØD DN Da D Kvs Kg /14 G1/2 12 mm x 2 / ,52 0,76 15 mm x G3/4 18 mm x 2 / 22 mm x ,70 0,96 Male threas (STADA) Threa length accoring to DIN 3546 With raining D DN D Kvs Kg = G1/2 = G3/ /09 G1/ ,47 0, /14 G3/ ,52 0, G ,70 0, G1 1/ ,70 1, G1 1/ ,2 1, G ,2 2, G2 1/ ,0 3,3 Male threas (STADA) Threa length accoring to DIN 3546 Excl. raining (can be installe uring operation) D DN D Kvs Kg /09 G1/ ,47 0, /14 G3/ ,52 0, G ,70 0, G1 1/ ,70 1, G1 1/ ,2 1, G ,2 2, G2 1/ ,0 3,2 = Flow irection Kvs = m 3 /h at a pressure rop of 1 bar an fully open valve. 4

5 BAANCING Accessories Measuring points Max 120 C (intermittent 150 C) Extension for measuring point M14x1 Suitable when insulation is use M14x1 71 Measuring point Extensions 60 mm (not for /-601) Can be installe without raining of the system Measuring point For oler STAD an STAF Max 180 C

6 BAANCING Weling connection Max 120 C Valve DN D Pipe DN G1/ G3/ G G1 1/ G1 1/ G G2 1/2 50 Solering connection Max 120 C Valve DN D Pipe Ø G1/ G1/ G3/ G3/ G G G1 1/ G1 1/ G G2 1/2 54 Connection with smooth en For connection with press coupling Max 120 C Valve DN D Pipe DN G1/ G3/ G G G1 1/ G1 1/ G G2 1/2 54 Compression connection Max 100 C D Valve DN D Pipe Ø G1/ G1/ G1/ G1/ G1/ G3/ G3/ G3/ G G1 28 Support bushes shall be use, for more information see catalogue leaflet FP. 6

7 BAANCING anwheel Complete Ientification tag Incl 1 pc per valve Allen key mm Pre-setting mm Draining Draining kit Can be installe uring operation G1/ G3/4 Insulation For heating/cooling See catalogue leaflet Prefab insulations for complete etails. For DN D B , 15,

8 BAANCING Measuring points Measuring points are self-seale. Remove the cap an insert the probe through the seal. Draining Valves with raining for G1/2 or G3/4 hose connection. Valves without raining have a sleeve. This sleeve can temporarily be remove an a raining kit is fitte, which is available as an accessory. Setting Setting of a valve for a particular pressure rop, e g corresponing to 2.3 turns on the graph, is carrie out as follows: 1. Close the valve fully (Fig 1). 2. Open the valve 2.3 turns (Fig. 2). 3. Using a 3 mm Allen key, turn the inner spinle clockwise until stop. 4. The valve is now set. To check the setting: Close the valve, the inicator shows 0.0. Open it to the stop position. The inicator then shows the set value, in this case 2.3 (Fig. 2). Diagrams showing the pressure rop for each valve size at ifferent settings an flow rates are available to help etermine the correct valve size an pre-setting (pressure rop). Four turns correspons to fully opene valve (Fig. 3). Opening it further will not increase the capacity. Fig. 1 Fig. 2 Fig. 3 Valve close The valve is set at 2.3 Fully open valve 8

9 BAANCING Measuring accuracy The zero position is calibrate an must not be change. Deviation of flow at ifferent settings The curve (Fig. 4) is vali for valves with normal pipe fittings (Fig. 5). Try also to avoi mounting taps an pumps, immeiately before the valve. The valve can be installe with the opposite flow irection. The specifie flow etails also are vali for this irection although tolerances can be greater (maximum 5% more). Fig. 4 ± % ,5 1 1,5 2 2,5 3 3,5 4 ) ) Setting, No. of turns. Fig. 5 Correction factors The flow calculations are vali for water (+20 C). For other liquis with approx. the same viscosity as water ( 20 cst = 3 E=100S.U.), it is only necessary to compensate for the specific ensity. owever, at low temperatures, the viscosity increases an laminar flow may occur in the valves. This causes a flow eviation that increases with small valves, low settings an low ifferential pressures. Correction for this eviation can be mae with the software TA Select or irect in TA-CBI. Sizing When Dp an the esign flow are known, use the formula to calculate the Kv-value or use the iagram. 9

10 BAANCING Kv values Turns DN 10/09 DN 15/14 DN 20 DN 25 DN 32 DN 40 DN DIAGRAM Example Wante: Presetting for DN 25 at a esire flow rate of 1,6 m 3 /h an a pressure rop of 10 kpa. Solution: Draw a straight line joining 1,6 m 3 /h an 10 kpa. This gives Kv=5. Now raw a horizontal line from Kv=5. This intersects the bar for DN 25 which gives 2,35 turns. NOTE: If the flow rate is out of the scale in the iagram, the reaing can be mae as follows: Starting with the example above, we get 10 kpa, Kv=5 an flow-rate 1.6 m 3 /h. At 10 kpa an Kv=0,5 we get the flow-rate 0,16 m 3 /h, an at Kv=50, we get 16 m 3 /h. That is, for a given pressure rop, it is possible to rea 10 times or 0.1 times the flow an Kv-values. 10

11 BAANCING Diagram ) Recommene area ) 25 b (A) ) 35 b (A) Tour & Anersson retains the right to make changes to its proucts an specifications without prior notice STAD

12