APPLICATION CONSTRUCTION

Transcription

1 Side Channel Pumps CEH... 8 CEH /... / with magnetic coupling TECHNICAL DATA Output: Delivery head: Speed: max. m³/h max. m (at rpm) max. 8 rpm Temperature: max. 8 C Casing pressure: PN / PN Shaft sealing: without shaft seal because of magnetic coupling Flange connections: DIN PN Direction of rotation: anti-clockwise, seen from the drive on the pump CEH pump with shell APPLICATION CEH pumps are side channel pumps with NPSH inducer stage suitable to handle liquids which do not contain solid matters or abrasive admixtures. The NPSH inducer stage allows the operation under unfavourable pumping conditions at suction side, also at positive suction heads lower than, m. The special ability se pumps to handle liquids at the boiling point has led to a wide field of application when condensate, distillate, coolant and liquefied gas shall be pumped. CEH pumps are applied in the chemical and petrochemical industry, in the pharmaceutical industry, in the plastic and rubber industry, in the surface finishing and hardening, in the foot, beverage and tobacco industry and in the air conditioning and refrigeration engineering. Pumps series CEH / with retaining sage to guarantee the min. filling level in the pump are especially applied to handle liquids under vapour pressure, also from underground tanks. DESIGN Pumps series CEH are horizontal, selfpriming side channel pumps, capable of handling gas along with the medium, in segmentaltype construction, with open vane wheel impeller as well as prearranged centrifugal stage for attaining favourable NPSH values. The sealing to atmosphere is effected glandless by an isolation shroud; the driver power is transmitted contactless by a magnetic coupling. The use of stable permanent magnetic material ensures the transmission nominal torque and given protection against overload. On the basis compact close coupled design has been created a pumping unit that is easily to be installed. All IEC standard motors of the construction type IM B are applicable. This design permits the operation pump without any additional coupling. Thus the alignment, a source of trouble, can be omitted. The pumps series CEH / are equipped with an additional retaining stage, behind the centrifugal stage, to prevent the emptying pump during standstill and thus keeping the selfpriming ability of the pump. The simple construction pump allows the assembly or disassembly without special tools. CONSTRUCTION Casing pressure: Construction size,,,, to :PN Construction size to 8, :PN Please note: Casing pressure = zero head + inlet pressure Test pressure bar resp. bar Branch positions: Suction branch arranged axially, discharge branch radially upwards. Flanges: The flanges comply with DIN /PN Flanges according to DIN with groove and bored to ANSI or as well as to BS table F is possible. Hydraulics: First hydraulics, designation of this construction type: A. Bearings: The pump shaft runs in two sleeve bearings of pure silicon carbide (SiC), lubricated by the pumping medium The remaining axial forces are absorbed by axial sleeve bearings. Optionally available a friction reducing coating bushings to avoid critical operation. The outer magnet is directly fixed on the motor shaft consequently the external bearing becomes unnecessary. Designation of this construction type:. F Sense of rotation: Anti-clockwise when seen from the drive on the pump. Shaft sealing: Without shaft seals by an isolation shroud Transmission driving moment by a magnetic coupling. Designation of this construction type: see last page. PUMP TECHNOLOGY CEH P III /... E 8/98

2 Material design: Pos....8,.9.,..8 BAUTELE suction casing discharge casing intermediate piece retaining stage MATERIAL DESIGN * A B F *** B F *** GGG. (.) G-X Cr Ni Mo 8 (.8). shaft up to -stufig:.; from stages:. X Cr Ni Mo N (.). impeller GG (.) G-X Cr Ni Mo 8 (.8). vane wheel impeller Cu Zn Al (.) G-X Cr (. ) PAEK G-X Cr Ni Mo Cu (.) bearing bush - special carbon..9,.9.,. thrust bearing bushing bearing bush silicon carbide (SiC) **. stool GG (.) or St - (.) 8. isolation shroud Hastelloy C (.) 8. flange for can St - (.) 8. inner magnet SmCo-magnets on St - (.), jacketed with X Cr Ni MoTi (.) 8. outer magnet SmCo-magnets on St - (.) 8.8 driving flange St - (.) * Special materials upon request, e.g. Hastelloy B/C titanium Monel. ** Optionally - coating to diminish the friction energy ***Only for the construction sizes,,,. Larger vane wheel impellers of PAEK are not available at present. PAEK Casing sealing: The casing sealing is made by soft Teflon and --ring PTFE. Designation of this construction type: Drive: By commercial three-phase A.C. motors, construction type IM B. The selection is depending on the power consumption hydraulics, taking into consideration the density and viscosity pumping medium. For the motor rating the eddy current losses are to be added to the pump performance. Motors controlled by frequency converters are admissible. The motors and magnetic couplings indicated in the delivery programme are selected for a mains frequency of max. Hz and are applicable for watery liquids. In case of differing speeds other magnetic dipole moments are necessary for the couplings. It is recommendable to check the selection with Sterling SIHI. Position: Usually the pump units are installed horizontally. The operation with vertically installed pump units is possible, but should be made only in consultation with Sterling SIHI because special instructions for starting-up, the support and thermal load drive motor. General remarks: The following pump series with magnetic couplings are available: Side channel pump without NPSH inducer stage: Series AEHB with vertical connection flanges Volute casing pumps acc. to: SIHI ISOchem-MAT-system e.g.: Series CBMD volute casing pump as per DIN EN 88 bearing bracket design Series CBED volute casing pump as per DIN EN 88 close coupled construction Series ZLKD volute casing pump close coupled construction - branches as per DIN / EN Series ZLID inline pump Series ZTKA volute casing pump for medium temperature up to C For lower delivery heads: Series AKLA /AKVA single-stage inline side channel pump Technical documentation on these programmes is available on request.

3 FUNCTION Partial flow: For the cooling isolation shroud, heated up by eddy currents, a partial flow is derived which at the same time serves as lubricant for the ceramic sleeve bearings. The partial flow flows through two longitudinal bores in the discharge casing into the isolation shroud and is led back through the hollow bored shaft and the balance bores rear vane wheel impeller to its suction side. By the pumping capability inner magnet, inside the isolation shroud a circulation flow is created which flows through the longitudinal bores inner magnet towards the bottom isolation shroud and in the gap between inner magnet and isolation shroud back to the front side inner magnet. This circulation flow is nearly independent operating point pump. Consequently the cooling isolation shroud is guaranteed over the entire characteristic. By the pumping capability lubricating grooves in the thrust bearing disk a further flow is created through the bearing gap radial bearing over the thrust bearing towards the longitudinal bores of the inner magnet. Thus, also independent operating point pump, the lubrication bearings is guaranteed. The front radial bearings are lubricated by a partial flow that flows from the first side channel stage through the bearing gap towards the rear side NPSH impeller. Bearings: The SiC bushings are clamped axially on the shaft. The material combination secures that the clamping power is maintained also in case of high temperatures. The stationary bearing inserts are screwed to the discharge casing or pressed into the intermediate piece.. Alternatively bearings coated with adamantine carbon are available. Hereby are considerably reduced the coefficients of friction during dry operation and danger to the pump can be prevented. This coating is applicable up to C. Safety: The magnetic bell is directly fixed on the motor shaft. The load on the bearings resulting from this is relatively slight and therefore a damage to the bearings very improbable. In order to protect the isolation shroud against internal or external damages by rotating parts, a stationary seat is installed in the stool and at the bearing insert. The distance from the rotors is smaller than that rotors from the isolation shroud. In order to obtain double leakproofness the application of fanless motors which withstand flooding, is possible. Then the sealed stool chamber serves to control the function isolation shroud. The pump has to be run with a motor load detector. It protects the machine against dry operation and operation beyond the range characteristic curves. VARIANTS Pump with shell applicable at high operating temperature and/or high operating pressure. Independent number of stages only two sealing points are necessary. The pump shown down on the right is equipped with a heat barrier and thus applicable at medium temperatures up to C without cooling. Pumps with heating or cooling chambers for the handling of smeltings or boiling media also are available. For such cases special heating stages, instead of normal stages, are installed in the pump and thus offering the heating or cooling by means of liquid or vapour.

4 Sectional drawing and nomenclature CEH. suction casing. vane wheel impeller 8. isolation shroud. discharge casing. thrust bearing 8. flange for can.8 intermediate piece. stool 8. interior magnet.9,.9 suction piece 8. bearing carrier 8. exterior magnet.,. discharge piece.,. spacer 8.8 driving flange. shaft.9,.9 sleeve 9. shaft screw. impeller. bearing bush CEH /. suction casing. impeller. bearing bush. discharge casing. vane wheel impeller 8. isolation shroud.8 intermediate piece. thrust bearing 8. flange for can.8 retaining stage. stool 8. interior magnet.9,.9 suction piece 8. bearing carrier 8. exterior magnet.,. discharge piece.,. spacer 8.8 driving flange. shaft.9,.9 sleeve 9. shaft screw

5 Characteristic curves, 8 H [m] Q - H, Phydr. [kw] Q - P hydr,, 8,,,,,, Q [m³/h],,,,,,, Q [m³/h],,,,,,,,, Q - NPSH Q - H z,,,,, Q [m³/h],, NPSH [m] pos. suction head at boiling conditions* HZ [m] CEH with magnetic coupling n = rpm, Visc.= mm²/s, spec.grav. = kg/dm³ * pay attention to suction conditions 8 H [m] Q - H Phydr. [kw] Q - P Q [m³/h] Q [m³/h],,,,8,,,, Q - NPSH Q - Hz Q [m³/h] NPSH [m] CEH with magnetic coupling n = rpm, Visc. mm²/s, spec.grav. kg/dm³ pos.suction head* pay attention to suction conditions at boiling conditions* Hz [m].

6 Characteristic curves 9 Q - H 8 Q - P H [m] Phydr. [kw] 8 Q [m³/h] 8 Q [m³/h],,,,,8,,,, Q - NPSH Q - H z Q [m³/h] 8 NPSH [m] pos.suction head at boiling conditions* H z [m] CEH with magnetic coupling n = rpm, Visc. mm²/s, spec.grav. kg/dm³ * pay attention to suction conditions Q - H Q - P H [m] Phydr. [kw] Q [m³/h] 8 9 Q (m³/h],,8,,, Q - NPSH Q - H z 8 9 Q [m³/h] NPSH [m] pos.suction head at boiling conditions*h z[m] CEH with magnetic coupling n = rpm, Visc. mm²/s, spec.grav. kg/dm³ * pay attention to suction conditions

7 Characteristic curves Q - H Q - P H [m] Phydr. [kw] Q (m³/h] 8 Q [m³/h] 8,,,8,,, Q - NPSH Q - H z 8 Q [m³/h] NPSH [m] pos.suction head at boiling conditions* Hz [m] CEH with magnetic coupling n = rpm, Visc. mm²/s, spec.grav. kg/dm³ * pay attention to suction conditions Q - H Q - P H [m] Phydr. [kw] Q [m³/h] Q [m³/h],,,, Q- NPSH Q - Hz NPSH[m] pos.suction head at boiling conditions* Hz [m] CEH with magnetic coupling n = rpm, Visc. mm²/s, spec.grav. kg/dm³ * pay attention to suction conditions, Q [m³/h]

8 Dimension table CEHB - 8 view A ut : connection for temperature probe G¼ CEHB / - / view A ut : connection for temperature probe G¼ flanges acc. DIN PN DN A/E 8 D 9 k 9 d x number X 8 x 8 x 8 x 8 x 8 8 x 8 x 8 Dimensions motor size nominal power D h m m n * n o * s * s * w* weight IPresp. mm abt. kg EExde EExe 8A,, 8 9 8, 8, 8B,, 8 9 8, 9 S,, 9 8, - 9 L,, 9 8, - 8 L,, - L,, - M,, S,, M,, M,, 8 8 L,, 8 8 M 8,, L,, L,, 8 9 S,, M,, 9 M,, * : dimension dependent on motor make 8

9 Dimensions pump size torque magnetic coupling IP EExe II T DNA DNE a a a b c D e e e e f h h h m* m* n n s kw kw mm kg,, K 9 9,,,, 8, K 9 8 9,, 88,, K 9, 9 9,, P, 8, - K,, P , 88, V,, P 9 -, - 8 8, V -, 9 -, P -, - 88, V, 98 - P, , V, 8 9, 8 8 8, V 8, , 9,, T 8 9, 9,, 9 9, T 8 9,,, 8 9, T, , - W, , T W 8 9, ,8 Z , T W 8 8 8, - Z 9 8 -,8 9 9, - A -, T W - 9 9, - Z 8 -,8 99 9, - A - W , - Z 8 -,8 99, - A, Z 99 8,,8 A , C 98 8 weight pump 9

10 size torque magnetic coupling IP EExe II T DNA DNE a a a b c D e e e e f h h h m* m* n n s kw kw mm kg, 9, T 8 -, - W, T 8,, W 8 8, Z T , W Z 8, 9 8,,8 A Z 9 9, -,,8 A C - Z 98, - A ,8 88 8, - C -, D ,8 A 8 8, - C D, E -,,8 C - - D 98 9, E , 8, - C D , E 8, -, 98 - T 8 9 8, W 99 8, Z 8 8 8,,8 A Z 9 89, - A 8,, C 998 -, D ,8 A 8 99, - C D 8, E 9 8, - D 9 8 -, E , 9 -, 9 - F 8 - A 89 - B, 8, E , 9 - F H, 8 8, E 8 -, 9 - F H - weight tpump

11 torque magnetic coupling size IP EExe II DNA DNE a a a b c D e e e e f h h h m* m* n n s T kw kw mm kg - 8 8, E 8 -, 9 - F H J -, E F H J L - K 9, 98 9,,8 A B -, E, - A B 8, 8, E 8 -, 98, 9 8, E 98 -, F - - H -, 8 8, E 88 -, 8 - F H - - J , E 8 - F - - H J L - K 9 - H 8 - F 9 - J - H 8 - J L - K 9 - M - F 8 - K - - H J L - K M - K H 8 - J L - K M weight pump

12 torque magnetic coupling size IP EExe DNA DNE a a a b c D e e e e f h h h m* m* n n s II T kw kw mm kg /,, K ,,,, 9 /, K 9 9,,,, K /, ,, P 88, 88, - K 9 /,, P 8 9,, V,, P - /, , V -, 98 -, P /, , V, P /, , V, 8 8 /, 9 8 /,, T 8 9, 9,, 9 9 /, T /,, 9, 8 89 /, T /, , - W, , T 8 8 / / - W 8 8, ,8 Z , T 9 8 / / - W 8 9 8, - Z 9 9 -,8 99 9, - A -, T W / /, - Z 8 -,8 99, - A - W /, - Z 9 98 / -,8, - A weight pump

13 size torque magnetic coupling IP EExe II T DNA DNE a a a b c D e e e e f h h h m* m* n n s kw kw mm kg, 8 /, T 9 -, W, T 8 89 /, 8, W 8 8, Z T , W 9 89 / - Z, 9 9,,8 A Z 98, - /,,8 A C - Z 8, - A / -, , - C , D -,8 A, - C / D, E ,,8 C / - D 9, E 8, - T /, W 8 8 8, Z ,,8 A Z 99 9, - A 8 /,, C -, D ,8 A 8 9, - C / D 8, E 9 8, 9 - D - /, E , -, - F A - B, 8 / 8, E 8 8 -, 9 - F H, 8 8, E 8 -, 9 / - F H , E 8 -, 9 / - F H - - J weight pump

14 size torque magnetic coupling IP EExe II T DNA DNE a a a b c D e e e e f h h h m* m* n n s kw kw mm kg, 8 99,,8 A / B -, E, - A - 8 / - B 8, 9 8, E 98 -, 88, 8 8, E 88 / -, F - - H -, 8, E 8 -, 8 - F / H J , E 8 - F H / J L - K 9 - H F 8 - J - H / - J L - K M - F 8 - K / - H J L - K M weight pump

15 Data regarding pump size - order hints series + size hydraulics + bearings shaft sealing + magnetic coupling coupling system coupling system coupling system coupling system material design casing seal isolation shroud of: A Hastelloy C (.) A first hydraulics torque of desychronization [Nm] for system / A main parts of spheroidal cast iron vane wheel impeller of brass B main parts of spheroidal cast iron soft PTFE and PTFE-O-ring F two liquid surrounded A 8 9 vane wheel impeller at isolation sleeve bearing B 8 of chrome steel shroud C F main parts of D spheroidal cast iron E 8 vane wheel impeller F 9 8 of PEAK H B stainless steel J F stainless steel, K 9 vane wheel L impeller PEAK M 8 P T V 8 W Z AK AK AK, AP AK, AP, AV AP, AV AP, AV AP, AV 8 AV and AT and AT and AT, AW and AT, AW, AZ and AT, AW, AZ, AA and AT, AW, AZ, AA and AW, AZ, AA 8 and 8 AZ, AA, AC AT, AW AT, AW, AZ alternatively: AT, AW, AZ, AA A AZ, AA, AC B CEH AF AZ, AA, AC, AD F AA, AC, AD, AE B AC, AD, AE F 8 AC, AD, AE AT, AW, AZ, AA AZ, AA, AC, AD AA, AC, AD, AE AD, AE, AF AA, AB, AE, AF, AH AE, AF, AH AE, AF, AH, AJ 8 AE, AF, AH, AJ, AK; AL AA, AB, AE AA, AB, AE AE, AF, AH AE, AF, AH, AJ AE, AF, AH, AJ, AK; AL AF, AH, AJ, AK; AL,AM AF, AH, AJ, AK; AL,AM 8 AH, AJ, AK; AL,AM Possible pump-magnetic coupling-motor combinations please take from the dimensions table.

16 series + size hydraulics + bearings shaft sealing + magnetic coupling coupling system coupling system coupling system coupling system material design casing seal isolation shroud of: A Hastelloy C (.) A first hydraulics torque of desychronization [Nm] for System / A main parts of spheroidal cast iron vane wheel impeller of brass B main parts of spheroidal cast iron vane wheel impeller of chrome steel soft PTFE and PTFE O-ring F two liquid surrounded A 8 9 F main parts of at isolation sleeve bearing B 8 spheroidal cast iron shround C vane wheel impeller D of PEAK E 8 B steinless steel F 9 8 F stainless steel, vane H wheel impeller PEAK J K 9 L M 8 P T V 8 W Z / AK / AK / AK, AP / AK, AP, AV / AP, AV / AP, AV / AP, AV / and / AT / and / AT / and / AT, AW / and / AT, AW, AZ / and / AT, AW, AZ, AA / and / AT, AW, AZ, AA / and / AW, AZ, AA / AT, AW / AT, AW, AZ alternatively: / AT, AW, AZ, AA A / AZ, AA, AC B CEH / AF AZ, AA, AC, AD F / AA, AC, AD, AE B / AC, AD, AE F / AT, AW, AZ, AA / AZ, AA, AC, AD / AA, AC, AD, AE / AD, AE, AF / AA, AB, AE, AF, AH / AE, AF, AH / AE, AF, AH, AJ / AA, AB, AE / AA, AB, AE / AE, AF, AH / AE, AF, AH, AJ / AE, AF, AH, AJ, AK; AL / AF, AH, AJ, AK; AL,AM / AF, AH, AJ, AK; AL,AM Possible pump-magnetic coupling-motor combinations please take from the dimensions table.

17 Order hints selection table - -phase AC motors, speed: n= rpm IP EEx e II T (Ex e G) IP and IP EEx d II T (TEF) size nominal power [kw] SIHI designation nominal power [kw] SIHI designation 8A, FK, FB 8B, GK, GB 9 S, HK, HB 9 L, JK, JB L, KK, KB L, LK, LB M, MK, MB S, NK, NB M,8 PK, PB M, SK, SB L, UK, UB 8 M, VK 8, VB 8 L, WK, WB L, XK, XB S, ZK, ZB M, AK, AB M, BK, BB Example of order A two stage pump (the NPSH-impeller is not connected) of size in material design B, equipped with a T-magnet and a, kw motor, protection type EEx e II T has the complete order number: CEH AF AT B JK On delivery, the point ( ) in the fourth place type designation is replaced by a letter in the factory. Any changes in the interest technical development are reserved. Sterling SIHI GmbH Lindenstraße, D- Itzehoe, Germany, Telephone +9 ()8 / -, Fax +9 ()8 / -