SRC Sanitary Remote- Controlled Valve

Transcription

1 SRC Sanitary Remote- Controlled Valve PD 619 GB Application SRC is an air-operated seat valve in a sanitary and flexible design giving a wide field of application, e.g. as a stop valve with two or three ports or as change-over valve with three to five ports. Working principle The valve is remote-controlled by means of compressed air. It has few and simple moveable parts which results in a very reliable valve. Standard design SRC consists of actuator, lip seal, plug and valve bodies. All components are assembled by means of clamp rings and a stem clip-system. For sizes and DN15, the piston and valve plug are screwed together. In order to facilitate installation the valve is only partly assembled when delivered. The valve has welding ends as standard. SRC, sizes and DN15 are very heavy. Therefore it is recommended to manufacture and use auxiliary handling equipment. Guidelines are given in IM. The recommended auxiliary equipment cannot be supplied by Alfa Laval. Actuator function. Pneumatic downward movement, spring return (NO).. Pneumatic upward movement, spring return (NC).. Pneumatic upward and downward movement (A/A), (not sizes and DN15).. Actuator for intermediate position of the valve plug as option (not sizes and DN15). Fig. 1. SRC valve with valve body combination 21. Valve body combinations Other valves in the same basic design: - Aseptic Remote controlled valve, type ARC. - Sanitary Long Stroke valve, type SRC-LS. - Sanitary Manual valve, type SMO. - Sanitary Manual regulating valve, type SMO-R. - Sanitary Manual valve, type SRC-BC. - Sanitary Manual valve, type SMO-R, SMO-RA. See also PD 689, PD and PD

2 Pressure drop/capacity diagrams Stop valve DN4/38 DN5/51 DN8/ DN4/38 DN5/51 DN8/6.1 1 DN1/ DN1/ DN15 5 DN15 Change-over valve 25 2 DN4/38 DN5/ DN4/38 DN5/51 DN8/ DN1/ DN8/6.1 DN1/ DN15 5 DN DN4/38 DN5/51 DN8/6.1 DN1/11.6 DN DN4/38 DN5/51 DN8/6.1 DN1/11.6 DN15 NOTE! For the diagrams the following applies: Medium: Water (2 o C). Measurement: In accordance with VDI 213.

3 Pressure data for SRC Actuator type / function 1. Pneumatic downward movement, spring return (NO-lower seat) 2. Pneumatic upward movement, spring return (NC-lower seat) 3. Pneumatic upward and downward movement (A/A), (not sizes and DN15). 6. Three-positions (NO-lower seat) (not sizes and DN15).. Three-positions (NC-lower seat) (not sizes and DN15). Table 1: Stop and change-over valves - Max. pressure without leakage at the valve seat Actuator / Valve body Actuator Valve size combination and direction pres- type/ Type DN25 DN4 DN5 DN65 DN8 DN1 DN of pressure sure function (bar) mm mm mm mm mm mm 1(NO) (NO) (NO) ISO Min DIN Min closes closes 6 1(NO) ISO Min DIN Min (NC) (NC) Min (NC) ISO Min closes closes (NC) DIN Min Min Min.1 Min.1.5 3(A/A) 6 Min.1 Min.1 Min.1 9. Min.1 Min ISO Min Min (A/A) DIN Min Min ISO Min.1 Min.1 Min.1. Min DIN Min = Values are valid for air pressure of 8 bar. = Actual product pressure.

4 Pressure data for SRC Table 2: Stop and change-over valves - Max. pressure for opening The table shows the approx. static pressure (P) in bar against which the valve can open. Actuator / Valve body Actuator Valve size combination and direction pressure type/ Type DN25 DN4 DN5 DN65 DN DN1 DN of pressure (bar) function mm mm mm mm mm mm 1(NO) ISO Min Spring opens 6(NO) DIN Min (NO) Min opens 6 6(NO) Min (NC) ISO Min opens 6 (NC) DIN Min (NC) Min Spring opens (NC) Min Table 3: Stop and change-over valves with extra strong springs or special cylinder (not for sizes -15) - Max. pressure without leakage at the valve seat Extra strong spring Spec. actuator Actuator / Valve body Actuator Valve size NW Valve size DN combination and direction pressure type/ Type DN25 DN4 DN5 DN65 DN8 DN of pressure (bar) function mm mm mm mm mm mm mm mm mm 1(NO) 6(NO) Min closes 5 ISO (NO) DIN (NO) ISO * * * 6 DIN Min * * * 5 2(NC) closes 6 (NC) * * * 2(NC) ISO Min (NC) DIN Min = Values are valid for air pressure of 8 bar. * = Do not use 6 bar air pressure.

5 Dimensions (mm) A 1 Inch DIN DN/OD DN Nominal size NC NO NC NO A A A A C OD ID t E E F F H M/ISO clamp M/DIN clamp M/ISO male M/DIN male M/SMS male M/BS male Weight (kg) Stop valve: Change-over valve: H F 1 A 2 H F 2 Caution, opening/closing time: Opening/closing time will be effected by the following: - The air supply (air pressure). - The length and dimensions of the air hoses. - Number of valves connected to the same air hose. - Use of single solenoid valve for serial connected air actuator functions. - Product pressure. E 1 A 3 A 4 Connections Compressed air: R 1/8" (BSP), internal thread. t ID OD E 2 M E 1 C a. Stop valve. t E 2 M ID OD Fig. 2. Dimensions. b. Change-over valve.

6 Technical data Max. product pressure (depending on valve specifications):... 1 kpa (1 bar). Min. product pressure:... Full vacuum. Temperature range: o C to +14 o C (EPDM). pressure:... 5 to kpa (5 to bar). consumption (litres free air) for one stroke Size mm mm DN DN 8-1 DN DN Stop valve/.2 x pressure (bar). x pressure (bar) 1.5 x pressure (bar) 2.2 x pressure (bar) Change-over valve Actuator function NO and NC NO and NC NC NO Stop valve/.4 x pressure (bar) 1.3 x pressure (bar) 3.6 x pressure (bar) 2.9 x pressure (bar) Change-over valve Actuator function A/A A/A NC (Support air for closing) NO (Support air for opening) Materials Product wetted steel parts:... Acid-resistant steel AISI 316L. Finish:... Semi bright. Other steel parts:... Stainless steel AISI 34. Plug stem:... AISI 316L with hard chrome plated stem surface. Product wetted seals:... EPDM rubber. Other seals:... Nitrile (NBR). Options equipment A) Male parts or clamp liners in accordance with required standard. B) Control and Indication (see chapter in Product Catalogue). C) Damper against water hammer. D) Actuator with stronger spring. E) Larger actuator for valve sizes 38-51mm, DN F) Stainless steel seal disc replacing standard lip seal. G) Two-step or three-position actuator (not sizes and DN15). H) Tangential side port valve. Material grades I) Surface roughness, product wetted parts: Ra.8 mm. J) Product wetted seals of Nitrile (NBR), Fluorinated rubber (FPM) or PTFE. Tools K) Service tools for actuator. Ordering Please state the following when ordering: - Size. - Connections if not welding ends (not sizes and DN15). - Valve body combination (not sizes and DN15). - Actuator function, NC, NO or A/A (A/A not for sizes and DN15). - Options. Note! For further details, see also PD 6536, PD and instruction IM. The information contained herein is correct at the time of issue, but may be subject to change without prior notice. PD 619 GB Sanitary Equipment, Headquarter Alfa Laval AB P O Box 3 SE-221 LUND, Sweden Telephone: Fax: sanitary.equipment@alfalaval.com