BakerBloc Pump Specifications

Here’s the full description of our BakerBloc pumpsets. When you specify them, make sure you include the following information.

Pumps – End-Suction Type 

Pumps shall be of the close-coupled, end-suction, back-pull-out type, equal to the “BakerBloc” series as supplied by Masterflow Solutions. Pumps shall be delivered to site as a prefabricated pump module complying with the following performance and construction criteria. 

Performance: 

• Refer to the schedule for the required pump duties. 
• Pipework velocities shall be in accordance with AIRAH standards. 
• Ensure eccentric reducers are installed on the suction line, and concentric reducers on the discharge. 

Casing: 

• Cast iron construction with drain and pressure gauge tapings. 
• Pump casing shall be radially-split, end-suction, vertical-discharge cast iron, designed for an operating pressure of 1600kPa. 
• Pump Casing to be self-venting with centre-line discharge. 
• Outlet shall be sized for a maximum velocity of 3m/s. 
• Casing shall be provided with drain facilities and pressure gauge tappings on inlet & outlet. 
• Casing to be provided with replaceable wear rings. 
• Built to pump standards DIN24255/EN733. 
• Chilled water pumps shall be fitted with stainless steel drip trays to collect condensate. Drip trays shall be drained to waste by installer. 

Impeller: 

• Stainless steel material and balanced. 
• Impeller shall be directly connected to the motor shaft with key and locked impeller nut.  

Shaft: 

• Stub shaft shall be of stainless-steel construction. 
• Stub shaft shall be fitted to the motor shaft via locking screws. 
• Stub shaft to be separate to the motor shaft so that the electric motor can be removed. Pumps with extended motor shafts are not acceptable. 
• Mechanical seals shall be provided between the casing and shaft to suit the fluid type, fluid temperature and operating pressures of the pump. 

Motor: 

• The motor shall be a metric frame, totally enclosed, fan-cooled, 415V, 3 phase with minimum IP66 protection and operating at 24r/s where practical. 
• Motor must be MEPS-compliant and registered. 
• Motors with extended shafts are not acceptable. 
• Minimum Class F insulation. 
• High-efficiency type and compliant to AS1359.5:2004, Table B3. 
• The motor shall be non-overloading at every point of the curve for the next size impeller. 
• The pump and motor shall be provided with a rigid base supporting both the pump and motor but not exerting any undue stress to the motor. 
• The pump and motor shall be fully assembled on the baseplate and factory-aligned. 

Base: 

• Pump base shall be hot dip galvanized and designed to facilitate the Back Pull Out design with easy removal of the motor to access the pump mechanical seal. 
• Pumps less than 30kW and located in plantrooms other than the basement shall be mounted on concrete inertia bases with a total mass of 1.5 times the mass of the rotating elements. 
• All pumps 30kW and larger shall be mounted on concrete inertia bases. 
• The whole assembly shall be supported on spring mounts of 25mm static deflection unless detailed otherwise on the pump schedule. 

The following points are to be included if you are intending on specifying a complete skid package. This may be on a project that has tight deadlines and lends itself to prefab equipment skids. A lot of things get missed by skid builders who have little experience with pumping equipment, so the following points will ensure a good outcome with respect to vibrations and performance. 

Skid Assembly: 

One completely fabricated solid single piece completely assembled assembly with the following: 

• Steel channel members (PFC) shall be used for the base. Alternative systems will not be accepted. 
• Inertia bases shall be pre-filled with concrete. 
• Pump springs shall be the seismic type. 
• Ensure sufficient tapings for binder points, gauges, and test points. 
• Pipework shall be self-supporting on the skid frame. 
• Pipework Headers to have spring hangers. 
• Lifting lugs shall be provided, and lifting certification issued prior to delivery. 
• The complete assembly shall be factory tested prior to delivery. 
• Ensure there is provision for adding Air Release Valves after skid has been delivered to site.  
• Air Release Valves to be the large throat type with ½ connection.  
• Springs on all pumpsets are to be adjusted after the skid is positioned on site. Correctly adjusted springs will mean pumpsets are free floating and can isolate any vibration. 
• The connection of the skid package to the system piping network is important. Ensure pipework headers downstream of the skid assembly are correctly adjusted after skid has been positioned so that there is no transmission of vibration to the building structure.  

If you’re unsure of anything when specifying a BakerBloc, please contact us via this form.