Diesel Water Pump

RM series self-priming diesel water pump

● It has the characteristics of large exhaust volume, high vacuum degree, low temperature operation, maintenance-free, no lubricating oil, and no mechanical seal.

● P-S-P automatic switching system: when the centrifugal pump completes self-priming, the EVP self-priming system will automatically switch to the dormant state. When self-priming is needed, the EVP will start again.

● Dry-running protection system: the pump set is equipped with a dry-running protection system, which can ensure the pump not to burn out the mechanical seal when running dry for a long time.

● Cooling system: high-pressure cooling water is come from the centrifugal pump inspection port into the end of the vacuum pump cooling chamber, and flows out quickly from the other end. It can quickly and efficiently cool the vacuum pump to ensure the pump operates at the lowest temperature, so that the EVP self-priming system has a long service life.

● Easy detachable structure: the vacuum pump cover located on the non-driving end side can be easily disassembled, and the vacuum pump scribe can be easily pulled out to facilitate inspection of wear.

● Clog-free impeller design: the centrifugal pump impeller is designed with a wide flow channel structure, which ensure the solid particles easily pass within the diameter less than 76mm.

● Self-draining function: the centrifugal pump cover is designed as a special structure with a slag-draining function, which can effectively prevent the mechanical seal spring from being stuck by deposited solid particles, thereby causing sealing failure.

General

RM series irrigation water pump is a single stage, single suction (axial suction) centrifugal for pumping clean water and the other liquids physically and chemically similar to the clean water. The temperature of liquid shall not be over 80ºC. This pump is suitable for public water supply and drainage duties in industries and land irrigation also in agriculture.

RM series centrifugal irrigation water pump is designed and produced according ISO2858 international standard,  efficiency improved 5%, NPSH reduce 2%, it's stable performance and standardized size parts, energy saving high efficient pump series.  

Structure

The major components are casing, casing cover, impeller,  shaft, wear ring,  shaft sleeve, bearing bracket etc.  

RM irrigation water pump is divided into the casing and the casing cover from the back face of the impeller I.e. back pull-out design. RM irrigation water pump has the advantages for ease of inspection and maintenance. When inspection, only dismantle the intermediate connector between pump coupling and motor coupling. The rotating element can be completely removed without disturbing the casing, suction and discharge pipeline and motor.

Pump volute

The irrigation water pump volute form is composed of casing and casing cover. The rotating element consists of impeller, shaft and rolling bearing. The rotating element is carried by the rolling bearings mounted in a hanging bearing bracket and radial and axial thrust is supported by the bearings.

Gimbal ring

In order to balance axial thrust, there are both wear rings in front and at the back of the majority of the impeller and the balance hole is on the back shroud of the impeller. The axial thrust of some pumps is not big enough, so there is no wear ring and balance hole at the back of the impeller.  

Seal ring

The shaft sleeve is on the shaft to avoid excessive shaft wear. There is "O" ring between the shaft and the shaft sleeve to prevent air entrance or water leakage along the matched surface.  

Seal type

Gland seal and mechanical seal