Sulzer submersible sludge pump JS 12

The submersible sludge pump JS 12 is excellent for pumping sludge and water mixed with solids. The pump has a slim design and low weight, which makes it easy to move and easy to handle. It can run without risk of overheating the motor or sludge clogging. 50 Hz: head max 12.5 meters, flow max 8.5 l/s. 60 Hz: head max 14 meters (46 feet), flow max 8.5 l/s (135 gpm).

Specification

Electric submersible pump.
Maximum submergence: 20 m. Protection class IP 68.
Max temperature of pumped medium at max power input and continuous duty 40 ºC.
Max medium density 1100 kg/m3. pH of the pumped medium 5-8. Free passage Ø 40 mm.
Max no. of starts 30/hour.
Max impeller diameter requires half motor or more submersed for continuous duty. (Pump can operate lying down.)

Electric motor

Single-phase motor with built-in capacitor, 50 Hz:

Service factor 1.1. Class F insulation.
Motor rating P2: 0.9 kW.
Speed: 2770 rpmŋ: 65.2 (50 %), 71.1 (75 %), 69.0 (100 % load)

3-phase squirrel-cage induction motor, 50 Hz:

Service factor 1.1. Class F insulation.
Motor rating P2: 0.9 kW.
Speed: 2770 rpmD.O.L. start with built-in contactor.ŋ: 78.0 (50 %), 76.0 (75 %), 70.5 (100 % load)

Power cable

20 m type H07RN8-F:
4 x 1.5 sq.mm. (3-phase)
3 x 1.5 sq.mm. (single-phase)

Motor protection

Built-in thermal switches in the stator winding (140ºC, ±5).

Shaft seal

Double mechanical seal in oil bath.
Primary seal: Silicon carbide on silicon carbide.
Secondary seal: Silicon carbide on silicon carbide.

Bearings

Upper bearing: Single-row deep groove ball bearing.
Lower bearing: Single-row deep groove ball bearing.

Discharge connections

2" (standard), 2 ½", 3" hose connections.
2", 2 ½", 3" B.S.P. threaded connections.

Weight

D: 19 kg, W: 20 kg (without cable)

Options and accessories

Zinc anodes. Surface protection coating.
Starter and control units. Floatation ring.
Repair kit. Discharge connection accessories and hose.

Materials