MQHBC Series Vertical Shaft Fire Pump

MQHBC series vertical shaft fire pump,as multistage centrifugal pump,shall be specially usedin all kinds of fire systems. The pump meets standards of FM1312, UL448, GB6245, EN128456, NFPA20, API610. Meanwhile, it can also meet the product inspection specifications of China Classification Society(CCS). The pump is suitable for a wide range of fire system such as factory, civil architecture, off-shore platform, ship etc.

MQHBC pump has two types of driving:motor driving and diesel engine driving,which can be selected by clients on the basis of the applied condition. There shall be a series of advantages, such as high reliability,long service life cycle, seawater resistance, compact structure, noiseless and easy to realize auto control etc.

Type Description

Working Conditions

1. Medium: water, seawater or similar corrosive liquid. PH value should be 6.5~8.5.
2. Medium temperature: ≤35℃ or≤90℃
3. Sand content(by weight): ≤3%
4. Ambient temperature: -25℃~+45℃
5. Relative humidity: ≤97%
6. Capacity: Q≤2500m³/h
7. Head: H≤250m
8. Class area: unclassified area or classified area
9. Power supply: 380V/460V//660V/1200V/3300V/6300V, 50Hz/60Hz, 3Ph(suitable for motor driving)
10. Installation mode and location:Pump should be operated vertically, and pump body shouldbe submerged and operating in water.Its inlet should be submerged in a position (when ebb-tide)lower than 1.5m to moving sea level. The distance of inlet to sea bottom should not be less than 0.5m. When the medium is water,the distance between the bottom of inletand the bottom of the pool is usually not less than 0.33m.

Note: When the actual application is beyond the above conditions, please contact with us. We shall adopt associated measures when designing in order to assure pump set to satisfy the application condition.

Construction Characteristic Description

The fire pump usually consists of pump body, electric motor/diesel engine, driveshaft, angle gear box(suitable for diesel engine driving), flexible coupling(suitable for diesel engine driving), column pipe, controller and other parts etc. The structural characteristics as follows:

1. Pump body

MQHBC series pump body consists of pump casing, pump shaft, impeller,shaft sleeve,bushing, wear ring, suction bell and other parts etc. Among them, the main components are usually cast iron, cast steel, Cu-Ni alloy, 300 series stainless steel, duplex stainless steel or Monel. The pump efficiency is high, the curve of character is smooth, and the zone of efficiency is extensive. The pump is suitable for using in water and seawater.

2. Electric motor/diesel engine

★ Electric motor(E)
MCH series three-phase asynchronous motor,which is matched with electric motor driving fire pump,it is also our company product and consists of stator,rotor,non -reversed rotation device, bearing, space heater, connection chamber, base, end covers and so on. According to the difference of working condition, the motor shall be classified into hollow shaft motor andsolid shaft motor. The non-reversed rotation device shall be used to prevent pump assemblies from damage by reverse rotation. The thrust bearings of the motor shall use centripetal thrust ball bearings,which can withstand reliably the entire weight of the rotating parts of the pump, and the hydraulic thrust of the pump impellers.As to hollow shaft motor,the axial position of the pump impeller shall be adjusted with a spacer and an adjusting nut.
The vertical hollow shaft motor meets NFPA 20 standard.

★ Diesel engine(D)
On the client requirements,we can adopt international famous fire pump diesel engines, such as Cummins,Caterpillar,Clarke and so on,and as requested we can use FM approved and UL listed diesel engine as fire pump driving device. The accessories of diesel engine such as silencer, battery and oil tank shallbe arranged according to the customer requirements.

(3)Right-angle gear box

Right-angle gear box only applies to diesel engine fire pumps. The main role is to transfer the level shaft power of diesel engine into the vertical shaft power of the pump. And at the same time it bears all the axial force of the pump and adjusts the axial position of pump impeller. Right-angle gear box is normally international brands and FM approved or UL Listed. It has the advantages of high reliability, low noise, transmission smooth, high efficiency etc.

(4)Controller

Electric fire pump controller is generally our company product, which is specialized designfor electric fire pump, with multiple protection and reliable quality.According to the specific requirements of customers, we can provide alarms of power break-off, reverse phase order and so on. In accordance with the requirements of the customer to start the motor, we can choose: direct start, Y-△ start,soft start,converter start and so on.Customers can choose themaccording to the actual working conditions.

The controllers of diesel engine fire pumps are generally chosen the internationallyrenowned brands. According to the specific requirements of customers, we can provide alarmsignals of over-speed、cooling medium temperature too high, and low lubricating oil pressure etc. The enclosure of controller can be different protective classification. The controller can be start-up in two ways:automatic and manual,and also provide emergency start-up mode.

The above-mentioned controller can be FM approved, UL Listed or meets GB6245 Standard.Customs can choose them according to the actual situation.

(5)other parts

Other components include:column pipes, drive shaft,bearing spider, coupling, wellhead device and standard parts, etc.

Pump seal uses packing seal. Stuffing box is of the removable type, easy to repair andreplace stuffing. Pump bearing is the polymer wear-resistant material suitable for pump dry start.

If fire pump is used in seawater systems, it is usual to install electrolyte dosing pipeline orbio-fouling preventing electrode apparatus,centralizer and so on.

The Range of Complete Fire Pump Supply

(1)Electric fire pump unit

Electric fire pump unit:pump body, motor, controller, column pipes, drive shafts, couplings, wellhead device, piping, bolts and nuts, the base, other attachment (including:automatic vent valve, safety valve, pressure gauge, sensors, etc.)

(2)Diesel engine fire pump unit

Diesel engine fire pump unit: pump body, diesel engine(accessory: battery, oil tank, silencer), drive shaft, coupling, wellhead device, bolts and nuts, controller, right gear box, flexible coupling,piping, the base and accessory(automatic vent valve, safety valve, pressure gauge, flow meter, sensors, etc.).

Order Information

Please determine the following parameter when ordering, so that we can recommend the suit product.
(1)The actual working condition
(2)The required capacity and head
(3)The drive modes of fire pump(electromotor or diesel engine). If you choose the electromotor mode, please offer the voltage and frequency of the locale power.
(4)The working media and temperature, medium solids content and the largest particles, containing corrosive ingredients etc.
(5)The range of set
(6)If FM Approved/UL listed Pump needed, please contact us for the performance parameters.