Pump Centrifugal
how to start a canned pump , centrifugal pump and a vacuum pump?
explain the procedure please
1.Centrifugal Pump:
First of all prime the pump keeping discharge valve closed and ensure that there is no entrapped air.Remember you have to prime the pump in static condition.
Then start the pump with close discharge valve .This is because of the high column head it has to withstand .If you open the discharge valve and start up the pump , then pump has to withstand the high torque which may damage the pump’s motor or prime mover.Be watchful and as soon as the flow is achieved and pressure is there , then start gradually opening the discharge valve.
In case of regenerative Turbine Pump, you can’t run the pump keeping the discharge valve close.
Bigger size pumps are equipped with star-delta starter ,so initially the pump will start at slow speed and then comes into a design speed to avoid the surge of torque.
During discharge valve closed, pump has to with stand inertia forces and little column head upto discharge valve and hence no danger of motor or pump shaft failure.
In smaller capacity pumps, you can start the pump in circulation
and establishing the pumping gradually open the discharge valve and close the circulation valve as the case may be.
It is essential that you should run the pump at its BEP .
Before doing any operation , keep in mind that you are operating the pump in a fully charged line or operating the the for the first time.
If you operating the pump for the first time , then discharge line needs to be primed by keeping the vent valve or end valve in open condition.
2.Vacuum Pump:
Place pump on flat surface REMOVE Oil Filler cap and the Filter Elements from Combination Exhaust Fitting.
-Pour oil SLOWLY to avoid OVERFLOW AND SPILL. Fill up to the center of the sight glass with INFICON approved HIGH VISCOSITY SHELL TURBO OIL T32/Equivalent.
NOTE: Oil level will rise when the pump warms up & reaches the operating temperature. Check oil level when warm & adjust if required. DO NOT OVERFILL.
-REFIT Filter Elements and Oil Fill cap, ensure the high density (thin) disc is on top. Any oil spill should be wiped with a clean dry cloth.
-REMOVE Cap from one of the inlet ports and turn the Isolation Valve to “OPEN” position.
-Turn power switch ON.
-Let the SHARK run in order to warm-up and when it is running smoothly, turn the Isolation Valve to “CLOSED” position and REPLACE cap on the inlet port.
-Turn power switch OFF and CONNECT to system.
PRIOR TO CONNECTING THE pump TO AN AC/R SYSTEM, REMOVAL OF REFRIGERANT FROM THE SYSTEM IS NECESSARY; DAMAGE TO THE PUMP MAY OCCUR IF
EVACUATION IS STARTED WHILE THE SYSTEM IS UNDER High Pressure.
-If a vacuum gauge is being used REMOVE cap from one of the inlet ports, and ATTACH it to the intake.
-Make sure fittings and connections are tight.
-Turn the Isolation Valve to “OPEN” position.
-Turn power switch ON.
-“OPEN” Gas Ballast valve for a few minutes to help bring pump up to its normal operational temperature sooner.
IT IS VITALLY IMPORTANT THAT THE PUMP HAS REACHED ITS NORMAL OPERATIONAL TEMPERATURE (50oC-70oC / 122oF-158oF) BEFORE ANY CONDENSABLE VAPORS ARE PUMPED. FAILURE TO DO THIS MAY CONTAMINATE THE OIL AND DAMAGE THE PUMP.
The pump is NOW READY TO EVACUATE air conditioning and refrigeration systems.
NOTE: If a system leak test needs to be done, it is recommended to keep the pump running after the isolation valve is closed.
Under no circumstances should the fittings on the vacuum pump be used for refrigerant transfer, as damage will occur to the valve.
3.Canned rotor pump:/Magnetic clutch coupling pump:
It is also a centrifugal pump , but it is a seal less pump.
If external bearing cooling is employed , then 1st ensure that.Prime the pump and start as centrifugal pump.
Try the search term in any search engine as following and you will have a lot of clues regarding caned pump:
“seal less pump”
“crane chem pump”
“stork pump”
“Lowrance pump”
How To / DIY : Make a Centrifugal Pump, easy drafts and working principles
|
|
March High Temperature Pump for Brewing Home Brew $131.20 This is the ideal brewing pump built by March Manufacturing. This pump is constructed of food-grade material, handles wort at boiling temperature, and takes back pressure (flow restriction). The pump housing is made from polysulfone because it is a tough, food-grade plastic rated to temperatures as hot as 250F, well above boiling wort temperatures. It offers many of the benefits of the ideal mate… |
|
|
Wayne Water Systems VIP50 1/2 HP 2,500 GPH Submersible Utility Water Pump $78.28 This unique Wayne utility pump passes 1/2in. solids such as leaves, pebbles, and other debris without clogging. 1 1/4in. discharge is adaptable to garden hose thread with rotating adapter (included). HP: 1/2, Flow (GPH): 2,500, Volts: 115, Max. Total Head (ft.): 15, Suction Type: Bottom, Discharge Port (in.): 1 1/4, Pump Housing: Glass reinforced thermoplastic, Volute: Glass reinforced thermoplast… |
|
|
Wayne RUP160 1/6-Horsepower 3,000 GPH Oilless Submersible Utility Water Pump $51.46 This Wayne Thermoplastic Submersible Utility Pump drains flooded basements, empties water-filled boats and removes water from stock tanks and flat roofs with its 1/6 HP motor. Features thermal-overload protection to prevent burn out. Oil-less motor design for environmentally safe operation. HP: 1/6, Flow (GPH): 3,000, Volts: 120, Max. Total Head (ft.): 20, Discharge Port (in.): 1 1/4, Volute: Imp… |
|
|
Wayne PC4 1/2 HP 115-Volt Transfer Water Pump, Cast Iron $118.45 The Wayne 1/2 HP 115-volt transfer water pump can pump water out of flooded basements, tanks, or boats. It can also increase line pressure by up to 40 pounds or be used to water lawns and gardens, and can even be used to wash cars and sidewalks. It’s made from durable cast iron steel. The included suction strainer keeps out extraneous material, and the 3/4-inch brass hose connections resist stripp… |
|
|
TE2-50RX – Tsurumi 2, 4.5 HP Robin Engine Driven Centrifugal Pump with Low This gas powered Robin Subaru engine water pump combines both heavy duty performance with a light weight frame. Its not only an effective pump in almost any situation but is affordable as well. Made with durable and reliable materials this pump is perfect for almost any situation. Features: Heavy-duty Robin gas engine with oil sensor and Silicon Carbide mechanical seal provides the longest life in… |
|
|
15 HP High Head Straight Centrifugal Pump 1.5 Horse Power High Head Straight Centrifugal Pump… |
|
|
30 HP Berkeley High Volume Centrifugal Pumps – 3 phase … |
|
|
1/2 HP Pool Centrifugal H.D. Water Pump $29.00 Features - Flow: 40L/Min - Metal Housing - Suction Max : 9M - Heavy Duty Motor - Voltage:115/60 Hz - Input Power 370 Watts - 1/2 Horse Power Motor - Disharge Head Max: 40M - Nozzle Demension Inlet/Outlet 1″ x 1″ MSRP: $169.99… |
|
|
Tsurumi TE2-50HA 2, 4 HP Honda Engine Driven Centrifugal Pump with Low Oil Sensor Tsurumi TE2-50HA Combining the power of a Honda engine and the durability that has come to personify Tsurumi pumps, this water pump is ideal for any situation. Both lightweight and powerful it can be used in almost environment and provides an affordable and efficient solution to excess water problems. Features: -Heavy-duty Honda gas engine with oil sensor and Silicon Carbide mechanical seal provid… |
|
|
Tsurumi TE2-50RX 2, 4.5 HP Robin Engine Driven Centrifugal Pump with Low Oil Sensor Tsurumi TE2-50RX This gas powered Robin Subaru engine water pump combines both heavy duty performance with a light weight frame. It’s not only an effective pump in almost any situation but is affordable as well. Made with durable and reliable materials this pump is perfect for almost any situation. Features: -Heavy-duty Robin gas engine with oil sensor and Silicon Carbide mechanical seal provides … |