OH1 Pump - FMD Model

Product Detail

Structure:

Frame plate

Pumps bigger than DN80 adopt double casing, foot mounting, and changeable and flushable glands. A compressible metal flat gasket is used to seal the clearance between the frame plate and the cover plate.

Flanges

Suction is horizontal and discharge is vertical. Flanges are available for bigger orifice loads and GB, DIN, and ANSI Standard. Suction and discharge flanges can usually bear the same pressure.

Hydraulic balance and axial balance

A bigger flange orifice ensures a low flow rate.  The design of the impeller and frame plate ensures low noise. Single suction radially split impeller(type N impeller) has sealed passage. Inducer impeller and open impeller are available for different specifications.

The changeable frame plate and impeller ring protect quick wearing area. Axial force gets balanced with a front ring or the front rear ring with balance holes. Remnant axial force is balanced by thrust bearing.

Bearing and lubrication

Bearing suspension is an entirety. Bearing adopts oil lubrication. Constant oil cup adjusts oil position automatically. The ring ensures sufficient lubrication when oil position changes to avoid partial heating due to not sufficient lubrication, According to the working condition, Bearing suspension can be no cooling(with radiator), water cooling(with water cooling sleeve), and wind cooling(with fan). The bearing is sealed by a piston anti-dust plate.

Shaft sealing

Shaft sealing by packing or mechanical seals, maximum shaft run out within 0.05mm.

Cover plate available for cooling or heat presentation. Connections with cooling, flushing, and sealing liquid. Standardized pipework according to API plans.

Assistant interface

G or ZG thread on the assistant interface (normally designed G thread).

The direction of rotation clockwise is seen from the driven end.

Design features-advantages-economic consideration

Application ranges

For pumping clean, slightly polluted, cold, hot, chemically neutral, or aggressive media.

1. In refineries, the petrochemical industry, coal processing, and low-temperature engineering.

2. In the chemical industry, paper industry, pulp industry, sugar industry, and general processing industries.

3. In the water industry, seawater desalination plants.

4. In heating and air-conditioning.

5. Power plants.

6. In environmental protection engineering.

7. In ship and offshore industries.

Advantage:

1. Design and maintenance standards complying with the process industry are ensured. Rapid disassembly or assembly. Disassembly without removal of pipework and driver.

2. Only 7 bearing frames for 48 sizes. The same hydraulics(impellers) and bearing frames as for light or medium duty series CHZ

3. Low branch velocity, low noise level, due to additional primary measures at impeller, long rated life of casings.

4. The casing joint cannot break.

5. Optimum compliance with various operating conditions, closed impeller with high efficiency, low NPSHR.

6. When casing and impeller wear rings and shaft seal are subject to wear, casing, impeller, and shaft can be reused small wear of casing and impeller wear rings due to the absence of solids.

7. Stable, aligning shaft position, robust shaft with small shaft deflection, few components，few bearing checks required，no cooling water pipework.

No cooling water consumption, no increased bearing heating,

8. Wear-resistant bearing sealing

9. Possibility of replacing packing or mechanical seals of any design.

Economic consideration

1. High reliability and interchangeability.Short shut-down. Low maintenance cost

2. Few components, economic spare .part stock keeping, low stock keeping costs.

3. Long-rated life of anti-friction bearings, long-rated life of shaft seals, short time for shutting- down, low maintenance costs higher efficiency, low operating

4. costs, low costs for pipework support and sound protection, low spare part and repair costs, and high reliability. High reliability of pumps, low maintenance periods, and low energy costs due to careful pump selection.

5. Small investment costs for plants.Considerable savings on repair and spare

6. part stock keeping costs, short repair periods.Long-rated life of packing or mechanical seals.Short shutdowns. Easy maintenance, low operating costs No investment costs for cooling system.

7.High interchangeability, low modification costs .(no machining of stuffing box housing).