Giant MP4130HT(C) service manual Installation Instructions, Important Operating Conditions

INSTALLATION INSTRUCTIONS

Installation of the Giant Industries, Inc., pump is not a complicated procedure, but there are some basic steps common to all pumps. The following information is to be considered as a general outline for installation. If you have unique requirements, please contact Giant Industries, Inc. or your local distributor for assistance.

The MP4130HT has been especially constructed for pumping hot water e.g. steam boiler storage. The plunger seals (40) on the water side are made out of a high temperature-resistant material. Rinsing chambers behind the high pressure seals through which cold water can flow thus increasing the life of the seals are available upon request (MP4130HTC). The cold water connections (59) are suited to the Ermeto-pipe 6mm dia. The operator can use hose nipples instead if he wishes. There are 1/8" threads in the seal sleeve for this purpose.

The cold water (50oF - 86oF) can be guided into the pump from either side and flows out on the opposite side e.g. into a drain. The cold water flow rate should be at least 0.13 GPM and must be put into use as soon as the pump is

NPSHR (FT-HEAD)

RPM

started. If the cold water doesn’t start flowing immediately the pump is put into operation, the ceramic plunger (29B) in particular, could crack under the cold shock.

Important! If the location of the pump doesn’t allow for cooling, on no account are the connections to be closed up because this is where water from the high pressure seals has to drip out. In this case, the holes can be used to fill the rinsing chambers with grease suitable for high temperatures, by means of a grease gun, thus assuring that the seals are always well greased. In the case of water temperautre above 320F, we strongly recommend the cold-water rinse.

Plant Lay-Out

For perfect functioning of the pump, the following points must be adhered to.

a) Pressure in Suction Side

The stipulated NPSHR is the minimum required pressure above vapour pressure of the medium and is never to fall short of this figure.Temperature and vapour pressure of the medium, the geodeti- cal height of the location, the flow rate and loss of friction in the suction line, must all be taken into consideration. It may be neces- sary to install a booster pump (centrifugal pump) in the suction line. b) Pulsation

Due to its construction, the plunger pump creates pulsation in the suction and discharge lines. Suction pulsation in particular must be dampened in order to prevent resonance in the suction line which in turn, causes cavitation. Therefore, the pump is never to be con- nected by a rigid pipe but rather by a flexible hose (not reinforced by steel), and if possible 1.5 to 2 times wider than the suction connec- tion. If a booster pump is used, the hose is to be attached between the booster pump and the high pressure pump.

If several pumps are used, each pump must have its own suction line. If this can’t be done, a suction air chamber or a suction flow stabilizer must be installed in front of each pump. The bladder in the stabilizer is to be pretensioned on location.

Depending on the lay-out of the plant, a pressure accumulator may be necessary on the discharge side. This pressure accumulator must be installed right behind the discharge outlet of the high pressure pu We recommend the use of only one pressure accumulator in discharge line in order to avoid irritation which could be caused by the different pre-tension levels in the accumulators. Gas-tension in both the suction flow stabilizer and in the pressure accumulator are to be checked regularly.

Finally, remember that high pressure operation in a pump system has many advantages. But, if it is used carelessly and without regard to its potential hazard, it can cause serious injury.

IMPORTANT OPERATING CONDITIONS

Failure to comply with any of these conditions invalidates the warranty.

1.Prior to initial operation, add oil to the crank- case so that oil level is between the two lines on the oil dipstick. DO NOT OVERFILL.

Use SAE 85W - 140 Industrial Gear Oil.

Crankcase oil should be changed after the first 50 hours of operation, then at regular intervals of 500 hours or less depending on operating conditions.

2.Pump operation must not exceed rated

pressure, volume, or RPM. A pressure relief device must be installed in the discharge of the system.

3.Acids, alkalines, or abrasive fluids cannot be pumped unless approval in writing is obtained before operation from Giant Industries, Inc.

4.Run the pump dry approximately 10 seconds to drain the water before exposure to freezing

2temperatures.