Wilo-Drain MTS

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Special features/product advantages

Cutter design yields fine solids for non-clogging operation
High degree of efficiency
Low operating costs
Resistant to obstructions and blockages
Macerator with scissors cutting action virtually eliminates clogging
Sealing chamber
High operational reliability
Corrosion-resistant stainless steel in AISI 316L (1.4404)
Explosion protection: FM Class 1, Division 1, Group C&D (MTS 40E… only)

Design

Submersible grinder pump with single-channel impeller for sewage as submersible monobloc unit for stationary and portable wet well installation. Motor available without (dry-motor) integral cooling system.

Application

Pumping of water containing domestic sewage. The Wilo macerator breaks up the solids into smaller pieces to produce an easily pumped fluid.

The MTS40 grinder pump is used typically in pressure sewer applications - both municipal and residential.

Pressure sewer, residence, camping site, etc.
Installation costs are reduced significantly due to the small pipe diameter, e.g. 1.6" (40 mm).

Technical data

Power connection: 1~230 V/60 Hz, 3~230 V/60 Hz or 3~460 V/60 Hz
Submerged operating mode: continuous duty (S1)Non-submerged operating mode: rated minutes operation (S2 or S3)
Protection class: Submerged under pressure (IP 68)
Insulation class: F
Thermal winding monitoring (normally closed contacts)
Max. fluid temperature: 37-104 °F (3-40 °C)
Cable length: 25 ft (8 m)

Model Numbers

e.g.:	Wilo-Drain MTS 40/165-3-460-60-2
MT	Macerator technology
S	Stainless steel motor
40	Nominal discharge diameter [mm]
165	Max. delivery head [ft]
3	Phase specification
460	Rated voltage
60	Frequency
2	Number of poles

e.g.:	Wilo-Drain MTS 40 E 143.80/40-3-460-60-2
MT	Macerator technology
S	Stainless steel motor
40	Nominal discharge diameter [mm]
E	Single-channel impeller
143	Max. delivery head [ft]
80	Max. volume flow [USgpm]
40	Nominal power P₂ (value/10 = 4.0) [hp]
3	Phase specification
460	Rated voltage
60	Frequency
2	Number of poles

Downloads

Details and downloads

Equipment/function

Innovative patented macerator
Unimpeded flow to the impeller
Internal rotating blade
Spherically formed macerator
Grinding/maceration of substances being pumped
Shearing cut (scissors cut)

Description/design

Submersible grinder pump as submersible monobloc unit with internal patented macerator cast in AISI 440B+Co solid stainless steel. Pump is designed for wet pit installation on guide rails or for use in portable applications in intermittent operation.

Hydraulics

The outlet on the pressure side is designed as a horizontal threaded or flange (for MTS 40E…) connection with a discharge size of 1.6" (40 mm). Double shrouded single-channel impellers are used in the design.

Motor

Glanded motors conduct heat directly to the surrounding fluid via the housing components and can be used in submerged state for permanent and intermittent operation.

A sealing chamber protects the motor from fluid leakage. The filling fluid used is biodegradable and environmentally safe.

Cable lengths are available in fixed lengths measured in 25 ft (8 m) intervals.

Sealing

Sealing on the fluid side is done using a bidirectional mechanical seal. For type MTS 40… , the seal used is a rotary shaft seal and for type MTS 40E…, it is a bidirectional mechanical seal.

Materials

Pump housing: ASTM A48 Class 35/40B (EN-GJL-250)
Impeller: ASTM A48 Class 35/40B (EN-GJL-250)
Shaft: Stainless steel AISI 420 (1.4021)
Mechanical seal on pump side: SiC/SiC
Shaft seal on the motor side (for MTS 40…): Nitrile (NBR)
Mechanical seal on the motor side (for MTS 40E…): SiC/SiC
Static gasket: Nitrile (NBR)
Motor housing: Stainless steel AISI 316L (1.4404)
Macerator: Stainless steel AISI 440B+Co (1.4528)

Scope of delivery

Pump ready for connection with 25 ft (8 m) connecting cable with bare end
Installation and operating instructions

Accessories

Guide system and pump base
Lifting chains or cables
Control panels and relays

Duty chart

Design

Submersible	•
Single-channel impeller	•
Vortex impeller	-
Multi-channel impeller	-
Open multi-channel impeller	-
Macerator	•
Turbulator	-
Sealing chamber	•
Leakage chamber	-
Sealing by mechanical seal on motor side	•
Sealing by rotary shaft seal on motor side	•
AC motor	-
Three-phase motor	•
Direct activation	•
Star-delta activation	-
VFD operation	-
dry motor	•
Motor with oil cooling	-
Dry motor with closed-circuit cooling	-

Application

Wet well installation, stationary	•
Wet well installation, portable	•
Dry well installation, stationary	-
Dry well installation, portable	-

Equipment/function

Motor leakage monitoring	-
Sealing chamber monitoring	-
Leakage chamber monitoring	-
Motor temperature monitoring, bimetal	•
PTC motor temperature monitoring	-
Explosion protection	•
Float switch	-
Capacitor box for 1~230 V	-
Ready-to-plug	-