Flow limiter SP/SMB8 - skf.com

1 1-3028-EN. Flow limiter SP/SMB8 . for mounting plates Flow limiters are used in large oil circulation Advantages lubrication systems. The task of a flow limiter reliable easy start-up is to divide up the volumetric flow of the main continuous dispensation of individual Pre-adjusted volume flows enable short line into parallel individual volumetric flow volume flows start up periods. quantities and to limit these according to - self-adjusting metering, thus identical effective monitoring of the volume flow requirements, or to keep them constant. volume flows despite different back signal transmitter or piston detector reacts The volumetric flow generated is independent pressures to approximately 30% deviations of volume of the system pressure and nearly indepen- - wide viscosity range of temperature and flow dent of viscosity.

2 Viscosity, due to stable system conditions wide range of operation, up to 200 bar The SP/SMB8 flow limiter was developed easy system design optional ATEX vesion or integrated gear specially for mounting plates. The advantage of The demanded volume flow and flow indicator for volume flow this design is its simple and compact construc- limiter nozzle and determined during tion. projection Using interchangeable plug-in nozzles, the space-saving cultivation volumetric flow of the flow limiter can be set in application of a base plate with an stepwise from to 8 l/min. This also makes access, up to 6 flow limiter attachable subsequent adjustments possible (necessary when the unit is modified, ). Tedious reset- ting and measuring are unnecessary. The volumetric flow can be monitored simply and safely with a signal transmitter or proxim- ity switch (which is also subsequently attach- See important product usage information on the back cover.)

3 Able). A fault signal occurs when the volumet- ric flow drops to approx. 70% of the nominal volumetric flow. Flow limiter SP/SMB8 . The SP /SMB8 flow limiter comes with two Functional diagram - flow limiter throttles installed in series (D1, D2). Throttle D1 is an interchangeable plug-in nozzle which, as a non adjustable orifice, determines p1 pressure upstream of plug-in nozzle D1. p2 pressure downstream of plug-in nozzle D1. nonadjustable oriice (plug-in nozzle). the rated volumetric flow. Nonadjustable ori- p3 D2 F p2 RK D1 p1. D1. adjustable oriice fice D1 is available with different nozzle cross D2. sections (see table on page 8 and 10). RK control piston p Throttle D2, on the other hand, is an adjust- F spring force able orifice that has a variable nozzle cross p3 pressure downstream of plug-in nozzle D2.

4 Section depending on the position of control (pressure outlet). piston RK. Displacement of the control piston A cross-sectional area of control piston (RK) against the spring force (F) automatically changes the flow resistance of throttle D2 in such a way that the differential pressure at nonadjustable orifice D1 remains constant, and thus the volumetric flow as well. p1 A = p2 A + F resp. p1/2 = p1 - p2 =. Flow limiter SP/SMB8 . F/A = constant Dimension SP/SMB8 . The result is: the difference in pressure upstream and 70 8,5. downstream of the variable nozzle is held 70. constant by adjustable orifice D2 (pressure balance). 40. 40. The condition for this function is that the 20. 20. system pressure p1 is always greater than the Outlet Inlet Outlets Inlet 11. 11. sum of the pressure drops in and after each M6 M6.

5 Flow limiter . E4 and E5 E6. p1 > p1/2 + p3 LED. Made in Germany Made in Germany Mengenbegrenzer Mengenbegrenzer For this reason the pump volume flow should SP/SMB 8/. 45. SP/SMB 8/. 45. D sen- D sen- _,_. _,_. exceed all individual flow quantities by approx. 15 %, , Q = ( Qi ). 105 10. 32 32 37 16. 70 70 installed length Due to the very short throttle length of the plug-in nozzle D1, the control characteristic is nearly independent of viscosity and tempera- ture, within the in the technical data specified Design flow limiter SP/SMB8 . viscosity range. with signal transmitter version E4. Selection of nozzle, cf. page 7. SP/SMB8 with sensor version E4, 24 V. 1 2 5 3 4 8 7 6. Fault position when nozzle clogged 1. 24-1072-2115. 24 V DC. 4. Made in Germany 1. 44. 3. +. - ge gr Normal position / go position - 3.

6 Green Yellow 1. 1. 24-1072-2115. +. 24 V DC. Made in Germany 1. 4. 3. 4. +. - ge 4. gr Outlet Fault position when no pressure/flow 1. 1 Casing 24-1072-2115. 24 V DC. Made in Germany 4. 1. 4. 3. +. - ge 2 Bush gr 3 Spring-loaded control plunger 4 Interchangeable plug-in nozzle 5 Pressure spring 6 Signal transmitter (optional) Note 7 Switching piston of the signal transmitter Green and yellow LEDs light when Go signal recei- (with a built-in signal transmitter) ved, when yellow LED goes out => fault signal. 8 Mounting plate 2 1-3028-EN. Flow limiter SP/SMB8 . Design Flow limiter SP/SMB8 . with signal transmitter version E5. SP/SMB8 with sensor version E5, 24-230 V. 1 2 5 3 4 8 7 6. Fault position when nozzle clogged max. 230 V AC/DC. 1. 24-1072-2114. 4. 1. 4. Made in Germany Normal position / go position 1.

7 ~. max. 230 V AC/DC. 1 =. 24-1072-2114. 4. 1. 4. Made in Germany 4. 1 Casing 2 Bush 3 Spring-loaded control plunger max. 230 V AC/DC. 1. 24-1072-2114. 4. Made in Germany 1. 4. 4 Interchangeable plug-in nozzle 5 Pressure spring Fault position when no pressure/flow 6 Signal transmitter (optional). 7 Switching piston of the signal transmitter (with a built-in signal transmitter). 8 Mounting plate Design Flow limiter SP/SMB3. with proximity switch E6. SP/SMB8 with proximity switch E6, 24 V. LED. PNP. Mengenbegrenzer 1. L+. SP/SMB 8/. Made in Germany 2. D sen- _,_. 3 L- - 3. +. 1 2. load Fault position with no flow = pin 2 open Normal position / go position = pin 2 closed 1-3028-EN 3. Flow limiter SP/SMB8 . Mounting plate for 1 to 6 flow limiters Mounting plate for SP/SMB8 flow limiter (40).

8 30. Material ..AlCuPb F38, neutrally anodized 15. 46 46. L. Mounting plate Qty-Flow- Dim. L Dim. L1 Weight Order no. P limiter [n] [mm] [mm] [kg/St.] Inlet 1 92 74 24-0714-3477 G 1/2 . 70. 2 138 120 24-0714-3478. 3 184 166 24-0714-3479 3. 4 230 212 24-0714-3480. Outlet 5 276 258 24-0714-3481. 9 L1 G 3/8 . 6 322 304 24-0714-3482. Mounting plate for 1 to 6 flow limiters Mounting plate with oil filter with extension for oil filter mounting WAF 27. 160. Material .. AlCuPb F38, neutrally anodized (40). 30. Mounting plate with oil filter 1) 46 46 15 92 75. Qty-Flow- Dim. L Dim. L1 Weight Order no. L. limiter [n] [mm] [mm] [kg/St.]. 40,5. 1 24-0714-3471. 2 24-0714-3472. 3 24-0714-3473. 70. 4 24-0714-3474. 5 24-0714-3475 3. 6 24-0714-3476 Outlet G 3/8 P Inlet G 1/2 . 1) Without oil fiter, must ordered separately.

9 9 L1. Mounting plate for a flow limiter with Mounting plate with interchangeable strainer interchangeable strainer 31. (40). 42. Material .. AlCuPb F38, 30. neutrally anodized 15. Mesh spacing interchangeable strainer .. mm Weight .. kg installed length 40 33. Replacement parts 17. Designation Order no. mesh spacing 300 m 24-1874-2106. Gasket set for interchangeable strainer 24-0404-2117. 70. WAF 27. Plate with interchangeable strainer Designation Order no. Outlet G3/8 . p Inlet G3/8 . Mounting plate with interchangeable strainer 24-0714-3470 9 75. 93. 4 1-3028-EN. Flow limiter SP/SMB8 . Oil filter with shut-off valve Oil filter with shut-off valve Material .. AlCuPb F38, neutrally anodized G 1/2 . approx. 130. Mesh spacing .. mm Weight .. kg 69. Replacement parts Designation Order no.

10 Valve insert with hand wheel 24-2104-2009. Filter insert, filter fineness 100 m 24-0651-2200 WAF27 69. Gasket set for filter 24-0404-2293 178 75. Oil filter with shut-off valve Designation Order no. Oil filter with shut-off valve for mounting basic plate 24-0651-3041. Dummy element to blank off unused Dummy element to blank off unused mounting mounting 40. Material .. AlCuPb F38, neutrally anodized Design .. with mounting screws M6 45 and sealing 11. Weight .. kg/St. M6. 32. 45. Dummy element 6. Designation Order no. Dummy element 24-0711-2403 32. 70. 1-3028-EN 5. Flow limiter SP/SMB8 . Technical Data General information Signal transmitter E4 / E5. Design .. 2-way flow limiter Type ..magnetic switch valve Switching element/contact type ..magnetic/reed contact Mounting position .. optional (filter always Ambient and lubricant temperature range.)