Vertical Inline Circulation Pump
Product Item：XRITD32-14 Technical parameters: Flow range: 4m³/h ~ 1200m³/h Head range: 4.5m ~ 108m Applications: industrial systems, water supply systems, cooling and air conditioning systems, system pressurization Application: Industrial systems Material: Cast iron/stainless steel
Description
Vertical Inline Circulation Pump
Introduction
LD pumps are single-stage in-line circulation pumps, equipped with standard motor and mechanical seal. Comparing with other pumps in similar structure, these pumps are less accessible to the impurity in the liquid.
LD pumps are designed to be pulled out from the top when disassemble. It can be repaired without affecting the pipeline.
LD32-LD150 are extended shaft structure. The mechanical seal for LD200 and above is cartridge mechan-ical seal, Motor needn't to be disassembled when replace mechanical seal.
Working conditions
This product is applied for thin, clean, non-flammable,non-explosive, solid free, fiber free, physically and chemically water-like liqiud, The performance curved will
descend and energy consumption ill be increased if the liquid viscosity or density is beyond the required level.
●Max. working pressure: 12 bar for normal type,16 barfor special type
● Liquid temperature: -15°C to 110°C
●Ambient temperature: up to 40°C
● Altitude: up to 1000m
● Rotation direction: clockwise (looking down frommotor fan)
Applications
LD pump is a versatile product that can transport various media from tap water to industrial liquids,mainly used for liquid conveying, pressurizing and circulating equipment. For example:
●District heating system (the water quality in the heating system should meet the recognized water quality standards of that kind of system)
●HVAC system
●Cooling system
●Domestic hot water system
● Industrial liquid transportation
●Water supply system
Minimum inlet pressure NPSH
In case that the pressure in pump is lower than the steam pressure used to convey liquid, the cavitations will occur.To avoid cavitations, a minimum pressure at the inlet side of the pump shall be guaranteed.
The maximum suction can be calculated with the following formula:
H=Pb×10.2-NPSH-Hf-Hv-Hs
H—Maximum suction head(m)
Pb—Atmosphere pressure(bar)
In a closed system,Pb means system pressure(bar)
NPSH—Net positive suction head(m)
It can be read from the point of Max.flow rate shown on NPSH curve.
Hf—Pipeline loss at the inlet(m)
It is in accordance with the pipeline possible Max.flow.
Hv—Steam pressure(m)
It depends on liquid temperature and steam pressure value.
Hs—Safety margin(m)
Minimum 0.5m delivery head.
If the calculated result H is negative ,the pump may run under the Max.suction head H.In case the calculated result H is negative,adelivery head of Min.inlet pressure isnecessary.
NOTE: Normally, the above calculation will not be done. H is calculated in the following conditions:
1.The liquid temperature is comparatively higher;
2.Liquid flow exceeds rated value;
3.Suction head is comparatively large or inlet pipeline long;
4.System pressure is too low;
5.Bad inlet condition.
Product structure
●The design if the pump is pump and motor pump partcan be pulled out. LD series are equipped with standard motor and mechanical seal.
●Motor is TEFC standard motor. Its major dimensions are in conformity with JB/T8680 standard.
●The pump body is equal to a section of pipeline, Whilein maintenance, blind flange can be used to seal to pump cover which enable to the normal operation of pumps.
●The flange connection dimension are in conformitywith the related provisions PN16 in GB/T17241.6 or ISO7005-2/DIN 2501.
●The inlet and outlet diameters are in conformity with related standard dimensions.
●The pump head is to connect motor and the pump.
●Oring is used to seal the pump head and the pump.
Installation requirements
LD pumps have different installation requirements.The detailsm are as below.
1. If the system pipeline can support the pumps, pumps with 2.2KW motor power(including 2.2KW) can be hung inine; if the system pipeline cannot support the pumps or the pump motor power is higher than2.2KW, the pump must be installed in brackets or base.
2.Pumps with motor power lower than 2.2Kw(including 2.2KW) can be installed horizontally or vertically to the pipelie.
Pumps with motor power higher than 2.2KW, can only be installed vertically to the pipeline.(see Figure 2-A)
3.The pump installation shall not allow the system pipeline tensile force to be transferred to the pump body.
4.The pumps should be installed in the environment with suficient cooling and the cooling air shall not beabove 40°C.
5.If the pumps are installed outdoors,there should be covers to protect electric components from water.
6.For the convenience of maintenance,there should be enough space above and below the pumps. Minimum 300mm shall be kept for pumps with motor power lower than 5.5KW, and minimum 1000mm for pumps with motor power higher than 5.5KW(including 5.5KW) (see Figure 2-B)
7. To prevent noises and vibration and ensure the best operation,anti-vibration base shall be used in installation Generally.cement base with the weight equal or bigger than 1.5xpump weight shall be adopted. (see Figure 2-C)
8.For LD32 to LD150, pumps with bases or without bases are both available for customers requirements.(See appendix TD32-LD150 for base dimensions)
