DIN 24255 High Pressure End Suction Centrifugal Pump , Fire - Fighting Water Centrifugal Pump

DIN 24255 High Pressure End Suction Centrifugal Pump , Fire - Fighting Water Centrifugal Pump?

Application

A. For wastewater treatment plant

B. For building water - supplying

C. For wastewater system

Key points for GHS accessories

A.?PUMP CASE:

foot support structure and spiral volute chamber, with volute chamber, foot, influent flange and discharge flange cast into an integrity. The flanges may be drilled accordance with international stand ISO 2084 DN16 or as requirement.

B.?IMPELLER:

Closed impeller designed in the excellent hydraulic model to guarantee pump performance and efficiency. The dynamic balance test shall be conducted.

C.?SUSPENSION FORK:

The suspension fork is installed with bearing inside. There are totally 6 bearing specifications for the whole series. The bearings shall be lubricated by lubricating oil (for some specifications) or grease.

Feature

A. Designed by following DIN24255

B. Materials are variable based on customer demand

C. The pump rotates in the colckwise direction if viewed from the driven end

D, Easy operation and maintenance.

E. The suction and discharge pipes no need be taken down for pump
cover and impeller disassembly.

F.?The GHS parts are universally replaceable. The whole series have 46 models that only adopt six types of shaft. All parts may be universally exchanged.

GHS structure drawing?

Installation?

LOCATION OF UNIT

The pump should be place as near the liquid source as practical so that a short direct suction

pipe may be used. The pump should be accessible for inspection and repair work and

headroom be provided for crane. hoist or tackle if the pump is heavy.

PIPING

Both the suction and discharge lines should be independently supported near the pump so that

no strain will be placed on the casing.

Suction Piping

The suction line should be as short and straight as possible and contain a minimum number of

bends. Any bends necessary should have large radii. Generally the suction pipe is made one or

two sizes larger than the pump suction branch. For pumps operating with suction lift no valves

other than a foot-valve should be placed in the suction line. All these precautions ensure that

maximum available suction head on the pump. Reducers must be eccentric if installed in a

horizontal position (Fig. I). A straight taper reducer (Fig. II) should not be used in a horizontal

suction line, because it may form an air pocket (IIA) in the top of the reducer and the pipe.

It is very important to have the suction line airtight and to avoid undulations in which air may

collect and destroy the vacuum. Where adverse suction conditions may cause the pump to lose

its prime, the use of an external automatic priming device such as a vacuum pump is

recommended.

Ensure that the system is free from foreign matter such as pipe scale, welding beads, dirt, etc.

It is suggested to flush the whole system before going into operation. If possible use a

temporary suction screen for removal of material in the pipe system.

For a give suction lift, suction capacity depends on the temperature of the liquid. For water

70℃(106°F)or above, care should be taken to ensure that enough pressure is available at the

impeller entry to prevent vaporization.

Foot Valve

Should have a fee area of at least one and a half times the area of the suction pipe.

An efficient strainer should be provided to prevent foreign matter from being drawn into the

pump or choking the foot valve.

When there is any refuse such as sticks, twigs, leaves, etc., in the water, a larger outside

screen, or a large basket strainer. This screen should have sufficient openings to keep the flow

through it below 0.6m (2 feet) per sec