V311. Venta. Three-way Plug Valve, Flanged PN 16

Transcription

1 1 Three-way Plug Valve, Flanged PN 16 can be used in a wide range of applications, such as heating, cooling, air handling and domestic hot water systems. Soft EPDM seals provide tight shut off. The valve can handle the following types of media: Hot and chilled water. Water with antifreeze additives such as glycol. If the valve is used for media at temperatures below C (32 F), it should be equipped with a stem or yoke heater in order to prevent ice formation on the valve stem. SPECIFICTIONS Design......three-way plug valve stem up closed ( port / - open) Pressure class PN 16 Flow characteristic EQM Flow characteristic Complementary Stroke mm Rangeability Kv/Kv min >5 Leakage - and Tight sealing m kpa (58 psi), water Max. temperature of medium: C Min. temperature of medium: C Connection Flange according to ISO 75-2 Materials ody nodular iron EN-JS 13 Stem Stainless steel SS 2346 Plug rass CW62N Plug Seal EPDM Seat Nodular iron EN-JS 13 Standard packing box Venta (EPDM) Pressure Equipment Directive PED 97/23/EC Cat. Size Kv Part number DN in. m 3 /h 15 ½ ½ ½ ¾ ¼ ½ Key to Technical specification The rangability is the ratio of Kv and Kv min. Kv (Cv) is the fl ow through the valve in m 3 /h at the specifi ed valve lift and at a pressure drop of 1 kpa across the valve. Kv min is the minimum controllable fl ow (m 3 /h) at a pressure drop of 1 kpa within the range in which the valve charac teristics conform to the slope requirements of IEC

2 2 DESIGN ND CHRCTERISTICS The design of the gives good resistance against solid particles in the fluid. The plug is guided throughout the lift, which reduces the risk of vibrations. CHRCTERISTICS Flow 1 The is designed to be used as a mixing valve. 8 The valve closes port with the stem up. 6 The flow characteristics - of the is equal percentage modified. The flow characteristics - is complement to - for constant sum of flow at ß=, Relative valve lift DESIGN Installed characteristics β =,5 CVITTIONS Pressure drop chart at the beginning of cavitation (kpa) Static pressure before valve 16 16C (32F) CVITTIONS Cavitation takes place in a valve when the velocity of the flow between the plug and seat increases to the extent that gas bubbles are created in the water. When, after the plug and seat, the velocity decreases, the gas bubbles collapse (implode), generating conciderable noise and causing conciderable wear on the valve C (284F) 12C (248F) 1C (212F) 8C (176F) 2C (68F) kpa Pressure drop over valve Pressure drop limit where cavitation might occur is dependent of valve inlet pressure and temperature of water. y means of the cavitation diagram shown in the figure it can be checked if risk of cavitation exists with the working conditions in the pertinent installation. Proceed as follows: Using the static pressure before the valve (e.g. 1 kpa), plot the horizontal line to the line for the temperature of the liquide (e.g. 12 C). From the intersection point, plot a vertical line downwards and read off the max.permissible pressure drop across the valve. If the computed pressure drop exceeds the value read from the diagram there is risk for cavitation. Schneider Electric Telephone Europe: Malmö, Sweden Telephone sia Pacific: Singapore January 211 co 211 Schneider Electric. ll rights reserved.

3 3 SPECIFICTION OF CTUTOR Use the diagram below to select actuator motor for the to close required c. suitable actuator is selected, using the summary data sheet F-1-6. CTUTOR POWER M8 / MG9 SR Δ INSTLLTION The valve should be mounted with flow direction in accordance with the valve marking. It is recommended to install the valve in the return pipe, in order to avoid exposing the actuator to high temperatures. The valve must not be installed with the actuator mounted below the valve. To ensure that suspended solids will not become jammed between the valve plug and seat, a filter should be installed upstream of the valve, and the pipe system should be flushed before the valve is installed. Schneider Electric Telephone Europe: Malmö, Sweden Telephone sia Pacific: Singapore January 211 co 211 Schneider Electric. ll rights reserved.

4 4 INSTLLTION. Circuit without local circulating pump. To obtain good function the pressure drop across the valve should be no less than half of the available pressure drop (). This will give a valve authority of 5%.. Circuit with local circulating pump. The K V value of the valve to be selected so that the entire available pressure drop,, falls across the control valve. C. Circuit with local circulating pump. The K V value of the valve to be selected so that the pressure drop across the control valve becomes equal to or greater than. PRESSURE DROP CHRT Press. drop psi kpa 2 Capacity Kv (m /h at Δp=1 kpa),25,4,63 1, 1,6 2,5 4 6, ,1,2,3,4,6,8,1,2,3,4,5, l/s,2,3,4,5,8 1, Schneider Electric Telephone Europe: Malmö, Sweden Telephone sia Pacific: Singapore January 211 co gpm Flow 211 Schneider Electric. ll rights reserved.

5 5 DIMENSIONS ND WEIGHT M8 E H D C F G Part No Conn. Dimensions Weight 731- C D E F G H DN In. mm mm mm mm mm mm mm mm kg ½ x ½ x ½ x ¾ x x ¼ x ½ x x SPRE PRTS Stuffing box Standard type S max 15 C (32 F) Item number On October 1st, 29, TC became the uildings usiness of its parent company Schneider Electric. This document reflects the visual identity of Schneider Electric, however there remains references to TC as a corporate brand in the body copy. s each document is updated, the body copy will be changed to reflect appropriate corporate brand changes. ll brand names, trademarks and registered trademarks are the property of their respective owners. Schneider Electric Telephone Europe: Malmö, Sweden Telephone sia Pacific: Singapore Schneider Electric. ll rights reserved January 211 co