Horticulture - Circulation Pumps
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Circulation Pumps

Pump applications in Horticulture Greenhouses More than a century ago greenhouse horticulture activities started in the “Westland” area in the Netherlands. Over the years in this region a specialised infrastructure arose, uniting growers, trade channels and suppliers of greenhouse components. D uring the last decades extensive research and constant innovation lead to the introduction of more and more technological systems in the greenhouse. These developments turned greenhouse activities into a high-tech technology that nowadays is exported worldwide. This technology includes the pump...

Pump types The Horticulture circulation pumps comprise the following range: CombiLine (CL) CombiLine (CL) and CombiLineBloc (CLB) pumps are build- CombiBlocHorti (CBH) and CombiBloc (CB) are close coupled in in-line pumps. These pumps are easy to install in straight foot-mounted volute pumps. These pumps are characterised pipelines; inlet and outlet flange connections have the same size by a compact build and a pump casing with horizontal inlet and and pattern and are positioned in-line. vertical outlet. CL and CBH share the same impeller/shaft seal/drive section (Back-Pull-Out unit). For...

pump cover sealed with O-ring all pumps are equipped with a mechanical seal with bellows, according to EN 12756 (DIN 24960) stainless steel extended motor specially designed center- ing bosses for optimal motor alignment, with minimal heat transfer to the electric motor all electric motors are suited for Euro voltage stainless steel stub shaft The hydraulic parts of all pump types have been optimized by using CFD (Computational Fluid Dynamics) during the design stage of the pump. Extensive testing at the SPX test laboratories proved that the pumps amply meet their design specifications.

cast-on bosses with threaded holes, for wall or floor mounting of the pump CL - CLB a specially designed suction bend ensures an optimal NPSH pump entry is provided with anti-rotation vanes to prevent vortex in the impeller inlet All pumps are designed according to a strong modular concept, resulting in a high degree of interchangeability of mutually equal components between the pump families (see diagram at the left).

Pump configurations The following overview shows the possible pump configurations of the Horticulture pump range. COM B I LI N E

Pump mounting positions It is possible to mount the pump in several different positions between the lines of the system, in horizontal as well as in vertical position. However, not all the possible positions are allowed. This overview shows the allowed mounting positions of the pumps of the Horticulture range. Horizontal, with motor in horizontal position, connecting box on top. Vertical, with motor in horizontal position, connecting box on top. Horizontal, with motor in vertical position. If necessary, the pump can be mounted on a base plate and foundation to avoid pump loads to the pipe...

Performance curves These performance curves are based on standard electric motor speeds and refer to water with a temperature of 20 °C. Hydraulic flow field CL and CLB at 50Hz 4 poles 30 Hydraulic flow field CL and CLB at 60Hz 4 poles Hydraulic flow field CL and CLB at 50Hz 6 poles [m] Hydraulic flow field CL and CLB at 60Hz 6 poles

Performance curves These performance curves are based on standard electric motor speeds and refer to water with a temperature of 20 °C. Hydraulic flow field CBH and CB at 50Hz 4 poles Hydraulic flow field CBH and CB at 60Hz 4 poles Hydraulic flow field CBH and CB at 50Hz 6 poles Hydraulic flow field CBH and CB at 60Hz 6 poles

Circulation systems H E AT E D WAT E R C I R C U L AT I O N Water circulation systems in the greenhouse are heated by a boiler or by heated water buffered in a large tank. The burner of the boiler also supplies the CO2 gas for growth; in those situations the heat is stored in the buffer tank. The heat might also be delivered by external companies, for example a joint facility for total energy supply in greenhouse areas. The heat is delivered to the circulation system by means of a heat exchanger. A manifold unit and a related control management system distributes the heat to all sections in...

Saving energy Warmth is a valuable commodity and you must apply it rationally! I N S U L AT E D P U M P S A N D VA LV E S Not many investment costs are recovered as quickly as when insulating the fittings in your central heating system, boiler house or technical spaces. Oddly enough, while most pipes are sufficiently insulated, most pumps, mixing valves, valves and flanges are not. SPX can supply insulation packages for these products. Our insulation packages can be fitted to the distribution groups to avoid excessive heat radiation. Every year countless cubic meters of natural gas are...

Frequency controlled motor drives In a unique cooperation with Danfoss, SPX can supply pumps with frequency controlled motor drive. In this way world wide service expertise and “online” support are guaranteed. V LT ® H VAC D R I V E F C 10 2 It offers a vast number of pump-specific features developed in cooperation with OEMs, contractors and manufactures all over the world. The VLT® HVAC Drive FC 102, built on Danfoss’ new modular plug-and-play platform and dedicated to HVAC applications, makes HVAC operation easy. Operators, equipment and control systems all communicate effortlessly with...

Hydraulic Investigator To find the best fitting pump for your pump application in the greenhouse the CombiLine, CombiLineBloc, CombiBlocHorti or CombiBloc ranges are available in a large number of sizes, which covers an ample hydraulic field. We recommend using our Pump Selection software "Hydraulic Investigator" developed by SPX Flow Technology Assen, to select the best available pump for your particular application. Guided pump selection based upon specific needs for any pump application. ■ Capacity, delivery head, mains frequency 50 or 60Hz and other criteria can be used to select the...