Two-port seat valves with male thread, PN16

Transcription

1 4 363 Two-port seat valves with male thread, PN6 VVG4... Two-port seat valves with male thread, PN6 Bronze Rg5 DN5... DN50 mm (½"... 2") k vs m 3 /h Stroke 20 mm Can be equipped with actuators SQX..., SKD... and SKB... Fittings can be delivered separately. Use For use in heating and domestic water systems as well as in ventilating and air conditioning systems as a control or safety shutoff valve as per DIN For open and closed circuits. Media Standard version with dezincification-free stem sealing gland for: Cooling water Chilled water Low temperature hot water Domestic water High temperature hot water C ) 2) Water with anti-freeze Saturated steam (up to max..5 bar abs.) ) 2) Brine ) Media below 0 C: ASZ6.5 stem heating element required to prevent freezing of the valve stem in the sealing gland. 2) Water with anti-freeze and brine: down to 25 C as per DIN 358 (stress case I) Special refrigerant valves with magnetic actuators are used for applications with refrigerants R ; see data sheets Siemens Building Technologies CMN4363E / HVAC Products /6

2 Type summary Standard version Type DN k vs S v p vmax. [mm] [inch] [m 3 /h] [kpa] VVG4. 5/2.5 ½ 0.63 VVG4.2 5/4 ½.0 VVG4.3 5/6 ½.6 > 50 VVG4.4 5/0 ½ 2.5 VVG4.5 5 ½ VVG ¾ 6.3 VVG VVG ¼ 6 > 00 VVG ½ 25 VVG DN = Nominal diameter p vmax. = Max. permissible differential pressure k vs = Nominal flow value as per VDI 273 across the valve s control path, S v = Rangeability as per VDI 273 valid for the entire stroke range Accessories Ordering Delivery Electric stem heating element, AC 24 V, required for media below 0 C : ASZ6.5 Indicate type. Example: VVG4.25 The fittings must be ordered separately. The valve, actuator and possible fittings are packed and supplied separately. Equipment combinations Valves Actuators ) Fittings SQX... 2) SKD... SKB... H 00 p max p s p max p s p max p s [mm] [kpa] Type VVG4. VVG4.2 VVG4.3 ALG5 VVG4.4 VVG VVG4.20 ALG20 VVG ALG25 VVG ALG32 VVG ALG40 VVG ALG50 Data sheet ) Actuators available for delivery: AC 24 V / AC 230 V with 3-position signal AC 24 V with proportional pos. signal DC V or DC ma 2) The p max and p values are valid for the new SQX32... / SQX82... and SQX62 actuators; deliverable from January 999 H 00 = 00% stroke of the valve and the actuator p max = Max. permissible differential pressure across the valve's control path across the entire actuating range of the motorized valve p s = Maximum permissible differential pressure (closing pressure) at which the motorized valve will close securely against pressure. Pneumatic actuators Pneumatic actuators are available on request from your local office. CMN4363E / Siemens Building Technologies 2/6 HVAC Products

3 Mechanical design Valve cross-section Guided perforated plug which is integrated in the valve stem. 4363Z0 The seat is attached to the valve body with the aid of special gland material. The two-port seat valve does not become a three-port valve by removing the blank flange. Disposal The various material types used require that you disassemble the unit and sort the components prior to disposal. Sizing Flow diagram V 00 [m³/h] ,8 0,5 0,4 0,3 0, 0,08 0,06 0,0 0,02 2 0,03 3 0,04 0,05 0, ,08 0, 8 0 p v00 [bar] 20 0,3 30 0,4 0, DN-kvs , /0-2,5 5/6-,6 5/4 - p v00 [kpa] 5/2, , p vmax ,4 6,8 4,2 8,4 5,8 2,8 2,2,7,4, 0,85 0,3 0,75 0,5 0, 0,08 0,06 0,03 0,02 0, D0 V 00 [l/s] p vmax. = Maximum permissible differential pressure across the valve s control path, valid for the entire stroke range p v00 = Differential pressure across the fully opened valve across the control path at V00 flow in kpa or in bar V 00 = Flow in m 3 /h or in l/s 00 kpa = bar 0 mwg Valve flow characteristic Flow k v /k vs 0,8 0, ,4 0,8 Stroke H / H D03E Valve flow characteristic % linear % n gl = 3 as per VDI/ VDE 273 Siemens Building Technologies CMN4363E / HVAC Products 3/6

4 Working pressure and temperature D03E Working pressure [bar] Working temperature [ C] Working pressure staged as per ISO 7268 and EN 333 at operating temperatures of C as per DIN 4747 and DIN 358. Notes Engineering We recommend installation in the return pipe, as the temperatures in this pipe are lower for applications in heating systems, which in turn, extends the stem sealing gland's life. Water quality requirements as per VDI In open circuits, there is a risk of valve plug seizing caused by scale deposits. Thus, use only the most powerful actuator SKB... for these applications. Additionally, periodic actuation (twice or three times per week) must be planned. Always use a strainer upstream of the valve. We generally recommend that you install a strainer even with closed circuits to increase the valve's functional safety. For media below 0 C, use the electric ASZ6.5 stem heating element to prevent the valve stem from freezing in the sealing gland. For safety reasons, the stem heating element has been designed for AC 24 V / 30 W operating voltage. Mounting Both valve and actuator can easily be assembled at the mounting location. Neither special tools nor adjustments are required. The valve is supplied with mounting instructions. Mounting positions 4363Z02 Permissible Not permissible Direction of flow When mounting, pay attention to the valve's flow direction symbol. Commissioning Commission the valve only if the actuator has been mounted correctly. Stem retracts: Stem extends: Increasing flow Decreasing flow CMN4363E / Siemens Building Technologies 4/6 HVAC Products

5 Service For actuator service work: Turn off the pump and the operating voltage, close the shutoff valves, depressurize the pipes and allow them to cool down. Disconnect the electrical connections, where required, from the terminals. Re-commission the valve only if the actuator has been mounted correctly. Stem sealing gland The glands can be exchanged without removing the valve, provided the pipes are depressurized and cooled off and the stem surface is unharmed. If the stem is damaged in the gland range, replace the entire stem-plug-unit. Contact your local office or branch. Spare parts Standard version 4363Z03 Replacement for EPDM-O ring sealing gland made from dezincification-free brass, including flat seal made from copper, for cooling water, chilled water, low temperature hot water, high temperature hot water, saturated steam, and brine C For VVG4... DN5... DN50 (Stem dia. 0 mm) Warranty The use of third-party actuators expressly voids any warranty claims. The technical data p max, p s, leakage rate, noise level and life apply only when used together with the Landis & Staefa actuators as listed in "Type summary". Technical data Function data PN class PN6 Valve flow characteristic % linear % n gl = 3 as per VDI / VDE 273 Leakage rate % of k vs value, VDE / VDI 273 Permissible pressure 600 kpa (6 bar), ISO 7268 / EN 333 Working pressure DIN 4747 / DIN 358 in the range of C Threaded connection Valve G...B as per ISO 228/ Fittings Rp... as per ISO 7/ Stroke 20 mm Materials Valve body bronze G-CuSn5ZnPb (Rg5) as per DIN 705 Seat, plug, and stem stainless steel Sealing gland dezincification-free brass Gland materials EPDM-O rings Fittings ALG black malleable cast iron Siemens Building Technologies CMN4363E / HVAC Products 5/6

6 Dimensions All dimensions in mm B L3 H DN D2 D H H2 L2 L L4 M N 4363M0 DN B D D2 H H2 L L2 L3 L4 M N Weight without fittings [mm] [kg] 5 0 GB Rp½ G¼B Rp¾ G½B Rp , G2B Rp¼ G2¼B Rp½ G2¾B Rp DN H DN = Nominal diameter [mm] SQX... SKD... SKB... H = Total actuator height plus minimum distance to 5 > 450 > 525 > 600 the wall or the ceiling for mounting, connection, operation, 20 service, etc. 25 > 460 > 535 > 60 H = Dimension from the pipe centre to install Structure 32 the actuator (upper edge) 40 > 470 > 545 > 620 H2 = Valve in the "Closed" position means that 50 the stem is fully extended 998 Siemens Building Technologies Ltd. CMN4363E / Siemens Building Technologies 6/6 HVAC Products