Penguin MTD Series Installation & Maintenance Download Page 1

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I n s t a l l a t i o n & M a i n t e n a n c e

P E N G U I N

MODELS

MTD-5

MTD-7-1/2

MTD-10

Series MTD

Magnetic Drive Pump

MATERIALS

B - Polypropylene

C - PVDF (Kynar)

Penguin magnetic-driven pumps are designed to handle a large range of chemicals without diﬃ culty. Constructed of polypropylene, kynar,

Series MTD pumps have an upper working temperature of 190/220/250 degrees, respectively, and thus can handle highly corrosive or mild

chemicals, acids or solvents. Series M pumps eliminate the conventional shaft seal found in most pumps. This means that there is no rotating

seal to wear out and allow the liquid being pumped to leak out. The pumping action may eventually fail, however, the liquid can never leak

out. Series MTD pumps are easy to install and operate, and are virtually maintenance free. All pumps have been tested for proper operation

before leaving the factory. To obtain optimum service life, please follow all instructions.

Install the pump as close as possible to the liquid reservoir from which the liquid is being pumped. As more energy is necessary to prime the liquid than to

discharge the ﬂ uid, make the suction as short as possible.

Always make sure there is enough liquid in the reservoir and the level is high enough considering the capacity of the pump unit. Inadequate liquid will cause

vortex in the reservoir. A vortex occurs when air mixes from the surface into the ﬂ uid. This can disturb the ﬂ ow and also prevents the pump from priming.

Never run the pump for more than 5-10 minutes against a closed discharge valve. This will cause overheating of the ﬂ uid in the pump and will damage the

polypropylene parts. Temperature in this case will increase up to 220 degrees. If the pump is being run against a closed discharge valve for a long duration

of time, install a small bleed line back into the reservoir before the discharge valve of the pump. If the line is small, there is a minimum pressure loss. This

prevents overheating by recirculating the ﬂ uid.

Model MTD pumps are supplied as standard in a single phase, single voltage, 115V, 50/60c motor with 230V as an option. All other models supplied with a

single phase are dual voltage, 115/230V motors. The factory wires all dual voltage motors for the lower voltage (115V) unless otherwise requested. When

changing from 115V wiring to 230V wiring, follow the motor manufacturer’s wiring instructions, which are found in the motor junction box or motor label. Be sure

to wire the motor for clockwise rotation as viewed from the suction entrance of the pump. A power cord and plug are supplied for immediate plug-in operation

on motors wired for the lower voltage. These motors have already been wired at the factory for proper rotation. A plug is not supplied on motors wired 230V.

Motors supplied in three-phase are dual voltage, 230/460V, 50/60c which are not wired at the factory. Since direction of rotation cannot be determined without

operating the pump, the motor rotation must be checked before operation. Attach leads to motor and bump start. Since these pumps must not run dry for more

than 10 seconds, do not leave motor running. As viewed from the suction entrance of the pump, check for clockwise rotation. If counterclockwise rotation,

change any two leads and check rotation again. Many options are available on the M Series motors including explosion-proof and special voltage motors. If

any of these options are required, please check the motors carefully or consult factory.

It is recommended to enlarge the suction line a minimum of one size larger than the suction entrance. Never reduce plumbing on the suction. Avoid 90 degree

elbows and never use a 180 degree elbow. Make sure that every suction coupling/connection is airtight. Always use a valve on the discharge of the pump.

In case of a ﬂ ooded suction, in which the liquid level is higher than the center of the suction entrance, provide a T-connection with a small valve after the

discharge valve to assist in letting the air out during ﬂ ooding. In case of a non-ﬂ ooded suction, in which the liquid level is lower than the center of the suction

entrance, provide a foot valve on the end of the submerged suction line.

ELECTRICAL

PLUMBING

RECOMMENDATIONS

INTRODUCTION