Cooling water Chilled water Low temperature hot water C Water with anti-freeze (max. 50%vol.)
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1 7ZRSRWVDWYDOYV 33 Female-threaded 7ZRSRWVDWYDOYV33IPDOWKDGG RGXODFDVWLRQYDOYERG\** 'PPò N YVP K 6WRNPP :LWKPDQXDORYLGKDQGZKO )RIPDOWKDGG5SòFRQQFWLRQVR )RILWWLQJEWZQ3R3IODQJV &DQEILWWGZLWKDFWXDWRW\SV646646R646 $SSOLFDWLRQ For use as a control or shut-off valve in accordance with DIN373 in small heating systems such as heating stations connected to a district heating network. )RFORVGFLFXLWVRQO\ GLD Cooling water Chilled water Low temperature hot water C Water with anti-freeze (max. 5%vol.) CMN4377E 4. 6LPQV%XLOGLQJ7FKQRORJLV /DQGLV 6WDID'LYLVLRQ
2 7\SV Valve type DN k vs S v p v max. [mm] [ins] [m 3 /h] [kpa] ½.63 > >.5 DN k vs S v p v max = Nominal diameter = Nominal flow to VDI73 = Rangeability to VDI73 = Maximum admissible pressure differential across the control path valid for the entire stroke range. GLQJ No screwed fittings or flanges are supplied with the VVI5 valves. When ordering, please specify the quantity, product name and type code. ([DPSO WZRSRWVDWYDOYVW\Sand DFWXDWRVW\S646 Delivery The valves and actuators are packed separately. &RPSDWLELOLW\ The VVI5.5 valves may be used in conjunction with Landis & Staefa actuator types SQS35, SQS65 or SQS85 (see data sheet N4573). Actuators ) or646 ) Valve type pmax p s [mm] [kpa] [kpa] ) Type SQS35 actuators AC 3 V with 3-position control signal Type SQS85 actuators AC 4 V with 3-position control signal ) Type SQS65 actuators AC 4 V with a DC... V or DC... V proportional control signal pmax p s % stroke of valve and actuator Maximum admissible pressure differential across the valve control path over the full actuating range of the motorised valve. Maximum admissible pressure differential (closing pressure) at which the motorised valve will still close tightly against the pressure. /6
3 FKDQLFDOGVLJQ 9DOYFRVVVFWLRQ 85 Guided parabolic plug, integrated into the valve stem. The seat, together with a special sealant, is pressed into the valve body. 7\SVRIFRQQFWLRQ The valves are equally suitable for flanged and screwed connections. They have flatsealing surfaces and a female thread. 4377Z 4377Z3 &RQQFWLRQÃEWZQÃIODQJV )PDOWKDGGÃFRQQFWLRQ DQGÃVFZGÃILWWLQJV 6L]LQJ )ORZGLDJDP S Y >ED@ >PñK@ ,8,6,5,4,3,,,8,6,5,4,3,,,,3 3,4,5, ,8, 8, ÃNvs ' Ã Ã Ã Ã Ã Ã Ã Ã Ã 3,3 4,4 5,5 6,6 8,8 Ã Ã Ã Ã S Y >N3D@ [ D P Y S ,8,,7,4,,85,6,8,,75,4,,8,6,8,,7,4,,85 kpa = bar mwg m 3 /h =.78 kg/s water at C p v max = Maximum admissible pressure differential across the valve control path in relation to the full stroke. p v = Pressure differential across the fully open valve across the control path at a flow rate V & in kpa or bar &V = Flow rate in m 3 /h or in l/s,6 >OV@ D 3/6
4 9DOYFKDDFWLVWLF.8 ÃN Y V.6 ÃN Y Ã Z.4 OR ) WRNÃ+ÃÃ+ 4377De Linear characteristic to VDI/VDE73 :RNLQJSVVX DQGWPSDWX 3 966en 3 D 5 Ã > E 4 X V 3 V ÃS J W LQ D S D 4 E Ã> 3 X V ÃS J 9 W LQ 8 D S SDWLQJÃWPSDWXÃ>ƒ&@ SDWLQJÃWPSDWXÃ>ƒ&@ Working pressures to ISO768 and EN33 at operating temperatures of +3 C to DIN4747 and DIN358 (QJLQLQJ In heating systems, the valve should preferably be installed in the return, where the stem seal will be exposed to lower temperatures, so extending its service life. Water should be of the quality recommended in VDI3 Note To increase the long-term reliability of the valve, a strainer should be installed at the valve inlet. RXQWLQJ Mounting instructions are enclosed with the valve. The VVI valve and SQS... actuator are easily assembled directly on site. There is no need for special tools or calibration. Orientation 4377Z4 3PLVVLEO RWSPLVVLEO Direction of flow When installing the valve, observe the flow-direction symbol Å marked on the valve. 4/6
5 &RPPLVVLRQLQJ The valve may be commissioned with the manual adjuster or SQS actuator in place. Stem retracted: Increasing flow Stem extended: Decreasing flow DLQWQDQF &DXWLRQ When servicing the valve: Switch OFF the pump and power supply, close the main shut-off valve in the pipework, release pressure in the pipes and allow them to cool down completely. If necessary, disconnect electrical connections from terminals. The valve may be re-commissioned with the manual adjuster or the SQS actuator in place. Stem seal The stem seal is not replaceable. In the event of leakage through the seal, the whole valve must be replaced. In this case, service/maintenance instructions must be observed. :DDQW\ The Landis & Staefa warranty is invalidated by the use of actuators from other manufacturers. The technical data in relation to pmax, p s, leakage rates, noise and service-life is valid only in conjunction with Landis & Staefa actuators SQS35..., SQS65... or SQS85... listed in the table under "Compatibility". 'LVSRVDO The valve must be dismantled and separated into its constituent materials before disposal. 7FKQLFDOGDWD Operating data PN class PN5 Valve characteristic % Linear, to VDI / VDE73 Leakage.... % of k vs value to VDI / VDE74 Admissible pressure 5 kpa (5 bar) to ISO768 / EN333 Working pressure DIN4747 / DIN358 Connection options Female thread Rp½ to ISO7/ Flange DN5 to ISO75 Stroke 5.5 mm Materials Valve body Nodular cast iron GGG-4.3 to DIN693 Seat, plug and stem Stainless steel Gland Brass Sealing materials EPDM O-rings Dimensions / Weight Dimensions See Dimensions Weight.65 kg 5/6
6 'LPQVLRQV All dimensions in mm )PDOWKDGG FRQQFWLRQ (DN5) Rp ½" 3 76,5 3,5 4377M )ODQJGFRQQFWLRQ M Rp½ (DN5) = Nominal diameter (DN5 is equivalent to Rp½) = > 367 mm = Overall height of valve from centre of pipe with SQS35..., SQS65... or SQS85... plus minimum clearance (> mm) from ceilings or walls for mounting, connection, operation, service etc. = > 56 mm = Installation height from middle of pipe, for actuator (upper edge) = > 65 mm = Middle of pipe to upper edge of handwheel 6/6 Siemens Building Technologies Ltd. Subject to technical alteration
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