VD1 CLC. Small Valves DIN-range with a higher k v -value

Transcription

1 0 EN - Small Valves DIN-range with a higher k v -value VD CLC Valve body made of brass, mat nickel-plated DN, DN 0 and DN Internally and externally threaded (Rp / R) conforming to ISO 7- Manual knob / protective cover included in the delivery Can be combined with motoric SSA -, thermal STA - - actuators CEN0en Building Technologies

2 Use For use in ventilation and air conditioning systems for water-side control of chilled ceilings and terminal units in closed circuits, eg for induction units, fan coil units, small re-heaters and small re-coolers -pipe systems with heat exchanger for heating and cooling 4-pipe systems with separate heat exchangers for heating and cooling In closed-circuit zone heating systems, eg for: Separate floors in a building Apartments Individual rooms Type summary Order Delivery Example: Type reference DN k v-value setting range [m /h) VDCLC 0 9 VD0 CLC VD CLC 0 6 When ordering, please give quantity, product name and type reference small valves VD0CLC Valves, actuators and accessories are packed separately Equipment combinations ) ) Product Types Data sheet Electromotoric actuators SSA / SSA6 ) / SSA8 N489 Thermal actuators -position Thermal actuators DC 0 0 V SSA9 ) STA / STA7 STA6 N700 N4884 Preadjustment of flow rate: > mm valve stroke If the valve travel is less than mm, self-calibration is not possible and the valve with the actuator remains blocked Preadjustment of flow rate: > 0 mm valve stroke If the valve travel is less than 0 mm, self-calibration is not possible and the actuator generates an error message Mechanical and technical design The valves make possible flow rate preadjustments by limiting the stoke A preadjusting screw with reference numbers from 0 to 7 is located under the protective cover right by the valve stem Gland with preadjusting ring Valve insert Fitting with O-ring 4 Valve plug with soft disk All valves are supplied with a protective cover That cover facilitates shutoff when making the plant pressure test and manual adjustments for improvised plant operation during the construction phase 0Z0 4 /8 Siemens Small Valves CEN0en Building Technologies 07-0-

3 Engineering notes The reference numbers for preadjustment are given in the table with the k v -values (see page ) and in the valve sizing charts (see page 4) Calculate the volumetric water flow V 00 V 00 Q00 [m /h] 6 T f Define the pressure drop p v00 across the fully open valve Q 00 = heat/refrigeration demand [kw] T = temperature differential [K] 6 = constant of water f = correction factor = for water In most types of plant, a differential pressure p v00 of 00 to 0 bar is adequate ( to 0 kpa) Calculation of the nominal flow value k v k v V 00 [m /h] p v00 = pressure drop across the valve [bar] p v00 Example: Heat demand Q 00 = 47 kw Temperature differential T = 8 K Volumetric water flow V = 0 m /h (0 l/h) Required pressure drop across the valve p v00 = 0 bar Flow 0 kv = 6 m /h 0 Solution According to the chart (refer to «Valve sizing charts») or table with k v -values, the preadjustment required by a VD0CLC valve is 6 Tips Noiseless operation is ensured by a pump that provides no more pressure than is needed to transport the required amount of water To keep the valve free from dirt particles, it is recommended to install a strainer If no pressure drop calculation is executed, preadjustment should be set with a differential pressure p v00 of 0 bar (0 kpa) Siemens Small Valves CEN0en Building Technologies /8

4 Valve data k v -values at the different preadjusted positions [m /h] Reference numbers for preadjustment 0 ) ) Valve stroke [mm] VDCLC VD0CLC VDCLC Flow tolerance [± %] Preadjustments < are not recommended because the stroke resolution is too small Note The k v -values give the volumetric water flow V in m /h passing through the valve at a pressure drop p of bar across the valve The preadjusting ring permits full revolutions The values given in the table (reference numbers 0 ) 0 ) ) define the first revolution After another revolution (reference number 0 ) 6), the stroke still increases to mm (fully open), but the k v values will not exceed 0 ) 0Z0 The valves are supplied with the preadjusting ring fully opened (reference number 0 ) ) To make a preadjustment, the ring must first be fully closed only then can the required reference number be selected The markings on the different types are not necessarily identical 4/8 Siemens Small Valves CEN0en Building Technologies 07-0-

5 Valve sizing charts VDCLC V 00 [ m /h] [kpa] [bar] 4 [mwc] p v ) 0 p v00 p v V 00 [ l/h] T = 0 K Q [ 00 kw] 40 T = 0 K 0D0 VD0CLC VDCLC V 00 [ m /h] [kpa] [bar] 4 [mwc] p v ) 0 p v00 p v V 00 [ l/h] T = 0 K T = 0 K Q [ 00 kw] 0D0 Siemens Small Valves CEN0en Building Technologies /8

6 Mounting notes Orientation To ensure correct functioning of the thermostatic heads and electromotoric actuators, observe the available mounting choices and mounting conditions VD CLC remains open if no actuator is mounted Z6 Maintenance Repair Disposal The small valves are maintenance-free The valves cannot be repaired; the complete units must be replaced The device is considered an electronics device for disposal in terms of European Directive 0/9/EU and may not be disposed of as domestic garbage Dispose of the device through channels provided for this purpose Comply with all local and currently applicable laws and regulations Warranty Application-related technical data are only warranted when used in connection with the Siemens controllers and actuators listed under «Equipment combinations» When using the radiator valves with actuators of other manufacture, any warranty by Siemens becomes void 6/8 Siemens Small Valves CEN0en Building Technologies 07-0-

7 Technical data Functional data PN class PN 0 Permissible media chilled water, low temperature hot water, water with anti-freeze; recommendation: water treatment to VDI 0 Medium temperature 0 C Perm operating pressure 000 kpa (0 bar) Differential pressure p max max 0 kpa ( bar) Differential pressure p v00 0 kpa (00 00 bar): recommended range Nominal stroke mm Standards, directives and approvals Environmental compatibility Pressure Equipment Directive Pressure Accessories PED 04/68/EU Scope: Article, section Definitions: Article, section Fluid group without CE-marking as per article 4, section (sound engineering practice) ) RoHS conformity compliant EAC Conformity Eurasia Conformity Product environmental declaration (contains data on RoHS compliance, materials composition, packaging, environmental benefit, disposal) Materials Valve body brass CuZn40Pb, mat nickel-plated Fitting brass CuZn40Pb, mat nickel-plated Protective cover polypropylene O-ring EPDM Dimensions / weight refer to «Dimensions» Mounting length EN Thread Rp internally threaded R externally threaded G-thread to ISO 7- to ISO 7- to ISO 8- ) Valves where PS x DN < 000, do not require special testing and cannot carry the CE label Siemens Small Valves CEN0en Building Technologies /8

8 Dimensions 0M0 E Rp R D C B A G Dimensions [mm] Thread [inch] Weight [kg] Type DN A B C D E Rp R G VDCLC 6 / / /4 08 VD0CLC /4 /4 0 VDCLC Published by: Siemens Switzerland Ltd Building Technologies Division International Headquarters Gubelstrasse 60 Zug Switzerland Tel wwwsiemenscom/buildingtechnologies Siemens Switzerland Ltd, 00 Technical specifications and availability subject to change without notice 8/8 Siemens Small Valves CEN0en Building Technologies 07-0-