STAF, STAF-SG. Balancing valves PN 16 and PN 25 DN
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1 STAF, STAF-SG Balancing valves PN 16 and PN 25 DN
2 IMI TA / Balancing valves / STAF, STAF-SG STAF, STAF-SG A flanged, cast iron (STAF) and ductile iron (STAF-SG) balancing valve that delivers accurate hydronic performance in an impressive range of applications. The STAF/STAF-SG is ideal for use mainly on the secondary side in heating and cooling systems. Key features > > Handwheel Equipped with a digital read-out, the handwheel ensures accurate and straightforward balancing. > > Self-sealing measuring points For simple, accurate balancing. > > Positive shut-off function For easy maintenance. Technical description Applications: Heating and cooling systems. Functions: Balancing Pre-setting Measuring Shut-off (The balancing cone for valve DN is pressure released). Dimensions: STAF: DN STAF-SG: DN Pressure class: STAF: PN 16 STAF-SG: PN 16 and PN 25 (see each product) Temperature: Max. working temperature: 120 C For higher temperatures (max. 150 C), please contact the nearest sales office. Min. working temperature: STAF: -10 C STAF-SG: -20 C Media: Water or neutral fluids, water-glycol mixtures (0-57%). Material: Body, STAF: Cast iron EN-GJL-250 (GG 25). Body, STAF-SG: Ductile iron EN-GJS DN : Bonnet, restriction cone and spindle of AMETAL. DN : Bonnet of ductile iron EN-GJS , cone of gunmetal CuSn5Zn5Pb5 (EN 1982) and spindle of AMETAL. DN : Bonnet of ductile iron EN-GJS , cone of ductile iron EN-GJS and gunmetal CuSn5Zn5Pb5 (EN 1982), and spindle of AMETAL. Seals: EPDM. Bonnet bolts: Chromed steel. Measuring points: AMETAL and EPDM. Handwheel: DN polyamide and TPE, DN polyamide, DN aluminium. AMETAL is the dezincification resistant alloy of IMI Hydronic Engineering. Surface treatment: DN : Epoxy painting. DN : Duasolid painting. Marking: Body: TA, PN, DN, flow direction arrow, material and casting date (year, month, day). CE-marking according to table: Marking STAF (PN 16) DN STAF-SG (PN 16) DN STAF-SG (PN 25) DN CE CE 0409* *) Notified body. Face to face length: ISO 5752 series 1, BS 2080 and EN series 1. 2
3 Measuring points Measuring points are self-sealed. Remove the cap and insert the probe through the seal. Sizing When Δp and the design flow are known, use the formula to calculate the Kv value or use the diagram. Formula Finding p of device p = at known fl owrate Finding q of device q = at known p Finding Kvs from known Kvs = fl owrate and p Where: q = kg/s : p : Kvs = signal Kv ( ) 2 q x 36 Kvs p x Kvs 36 q x 36 p Measuring accuracy The handwheel zero position is calibrated and must not be changed. Deviation of flow at different settings The curve holds for valves with the correct flow direction, straight pipe distances (Fig. 1) and normal pipe fittings. DN ± % ,5 1 1,5 2 2,5 3 3,5 4 *) *) Setting, No. of turns. DN ± % *) *) Setting (%) of fully open valve. Fig. 1 2 D 5 D 2 D 10 D Correction factors The flow calculations are valid for water (+20 C). For other liquids with approximately the same viscosity as water ( 20 cst = 3 E=100S.U.), it is only necessary to compensate for the specific density. However, at low temperatures, the viscosity increases and laminar flow may occur in the valves. This causes a flow deviation that increases with small valves, low settings and low differential pressures. Correction for this deviation can be made with the software HySelect or directly in our balancing instruments. 3
4 IMI TA / Balancing valves / STAF, STAF-SG Kv values DN Turns DN 20 DN 25 DN 32 DN 40 DN ,511 0,60 1,14 1,75 2,56 1 0,757 1,03 1,90 3,30 4, ,19 2,10 3,10 4,60 7,2 2 1,90 3,62 4,66 6,10 11, ,80 5,30 7,10 8,80 16,2 3 3,87 6,90 9,50 12,6 21, ,75 8,00 11,8 16,0 26,5 4 5,70 8,70 14,2 19,2 33 DN Turns DN 65-2 DN 80 DN 100 DN 125 DN ,8 2 2,5 5,5 6,5 1 3, , , , ,5 8 11,5 21, , , ,6 19, , , , ,
5 DN Turns DN 200 DN 250 DN 300 DN 350 DN
6 IMI TA / Balancing valves / STAF, STAF-SG Setting It is possible to read the set value on the handwheel. The number of turns between the fully open and closed positions is: 4 turns for DN 20-50, 8 turns for DN , 12 turns for DN , 16 turns for DN 300, 20 turns for DN 350 and 22 turns for DN 400. Initial setting of a valve for a particular pressure drop, e g corresponding to 2.3 turns on the graph, is carried out as follows: 1. Close the valve fully (Fig 1) 2. Open the valve to 2.3 turns (Fig. 2). 3. Using an Allen key, turn the inner spindle clockwise until the stop position. 4. The valve is now set. To check the setting of a valve, first close the valve, then open it to the stop position; the indicator then shows the presetting number, in this case 2.3 (Fig. 2). Example DN 65 Fig. 1 Valve closed Fig. 2 The valve is set at 2.3 Example DN 200 Fig. 1 Valve closed Fig. 2 The valve is set at 2.3 6
7 Performance Graph, DN 20 (3/4) Standard Flow / Flanged p [kpa] 7
8 IMI TA / Balancing valves / STAF, STAF-SG Performance Graph, DN 25 (1) Standard Flow / Flanged 8
9 Performance Graph, DN 32 (1 1/4) Standard Flow / Flanged p [kpa] 9
10 IMI TA / Balancing valves / STAF, STAF-SG Performance Graph, DN 40 (1 1/2) Standard Flow / Flanged p [kpa] 10
11 Performance Graph, DN 50 (2) Standard Flow / Flanged p [kpa] 11
12 IMI TA / Balancing valves / STAF, STAF-SG Performance Graph, DN 65-2 (2 1/2) Standard Flow / Flanged / Grooved p [kpa] 12
13 Performance Graph, DN 80 (3) Standard Flow / Flanged / Grooved p [kpa] 13
14 IMI TA / Balancing valves / STAF, STAF-SG Performance Graph, DN 100 (4) Standard Flow / Flanged / Grooved p [kpa] 14
15 Performance Graph, DN 125 (5) Standard Flow / Flanged / Grooved p [kpa] 15
16 IMI TA / Balancing valves / STAF, STAF-SG Performance Graph, DN 150 (6) Standard Flow / Flanged / Grooved p [kpa] 16
17 Performance Graph, DN 200 (8) Standard Flow / Flanged / Grooved p [kpa] 17
18 IMI TA / Balancing valves / STAF, STAF-SG Performance Graph, DN 250 (10) Standard Flow / Flanged / Grooved p [kpa] 18
19 Performance Graph, DN 300 (12) Standard Flow / Flanged / Grooved p [kpa] 19
20 IMI TA / Balancing valves / STAF, STAF-SG STAF Cast iron Bolted bonnet (MDF3) PN 16, ISO , EN DN Number of bolt holes D L H Kvs Kg Article No Bolted bonnet (MDF2) Without measuring points PN 16, ISO , EN DN Number of D L H Kvs Kg Article No bolt holes STAF-SG Ductile iron Threaded bonnet PN 25, ISO , EN (DN also fit PN 16 flanges) DN Number of D L H Kvs Kg Article No bolt holes Bolted bonnet PN 25, ISO , EN DN Number of D L H Kvs Kg Article No bolt holes = Flow direction Kvs = m 3 /h at a pressure drop of 1 bar and fully open valve.
21 Bolted bonnet Measuring points on body PN 16, ISO , EN DN Number of D L H Kvs Kg Article No bolt holes PN 25, ISO , EN DN Number of D L H Kvs Kg Article No bolt holes = Flow direction Kvs = m 3 /h at a pressure drop of 1 bar and fully open valve. Commissioning set This product, when combined with MDFO measuring device can be ordered as a commissioning set by the name of MDF4 or MDF4SG. 21
22 IMI TA / Balancing valves / STAF, STAF-SG Accessories L d Measuring point AMETAL /EPDM d L Article No DN R1/ R1/ DN R3/ R3/ Measuring point Extensions 60 mm (not for / -601). Can be installed without draining of the system. AMETAL /Stainless steel/epdm L Article No d L Measuring point For older STAD and STAF Max 150 C AMETAL /EPDM d L Article No DN R1/ R1/ DN R3/ R3/ Identification tag Article No Handwheel Complete DN Article No Allen key For locking of setting. [mm] For DN Article No Insulation For heating/cooling CFC-free polyurethane. Covered with grey PVC. See catalogue leaflet Prefab insulations for complete details. For DN L D C Article No
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24 IMI TA / Balancing valves / STAF, STAF-SG 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 UK STAF, STAF-SG v
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BUTTERFLY VALVE 17 SERIES Gearbox
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Butterfly valves PN 16
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Differential pressure controller AFP / VFG 2 (VFG 21)
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Technical changes kept in reserve THROUGH CONDUIT KNIFE GATE VALVE
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Maintenance-free metallic seat shut-off globe valves
Type leaflet 7150.1/5-10 BOA R -H Maintenance-free metallic seat shut-off globe valves with bellows flanged to new European standard 1092-2 type 21 Grey cast iron PN 16 DN 15-300 Nodular cast iron PN 16
MADE OF STAINLESS... Certificate 3.1
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Ref ALL POSITIONS CAST IRON CHECK VALVE PN16. Model/Ref:
Model/Ref: 363-366 www.lauridsenindustri.com Size : Ends : Min Temperature : Max Temperature : DN 50 to 600 Flanges R.F. ISO PN10/16-10 C + 130 C Max Pressure : 16 Bars up to DN300 ( 10 bars over ) Specifications
Size : Ends : Min Temperature : Max Temperature : Materials : Cast iron body. Certificate 3.1. * according to DN
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STV DN 10-50, Balancing valve
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Differential pressure controller AFP / VFG 2 (VFG 21)
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Butterfly valves, PN6, PN10, PN16
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System Components. Potable water Distributors, wall boxes and connections
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Combi valves PN 16 with flanged connections
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WAFER BUTTERFLY VALVE
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LUG BUTTERFLY VALVE PN10/16
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Valve bodies type RA-N with integrated presetting
Data Sheet Application Straight version Angle version Left mounted angle version Horizontal angle version All RA-N valve bodies can be used together with all types of thermostatic elements in the RA 2000