Piston Air Compressor/Vacuum Pump

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Piston air compressors / vacuum pumps provide compressed air as a source of energy or to transport natural gas. Raptor supplies offer a wide range of piston air compressor / vacuum pumps from brands... Read More

WELCH -

Piston Vacuum Pumps

StyleModelFull Load AmpsHPInlet SizeOutlet SizeOverall HeightOverall LengthOverall WidthPrice (inc. GST)
A2546B-011.71/41/4" Hose1/4" Hose9"10"7.5" SGD 2563.81
B2581B-502.21/33/16" Hose3/16" Hose10.5"17 5/16"10.5" SGD 6681.47
C2561B-502.21/33/16" Hose3/16" Hose12"17"7.5" SGD 5549.64
GAST -

Rocking Piston Air Compressors, 1/4 Inch NPT Inlet

Gast rocking piston air compressors / vacuum pumps deliver pressurised air while dampening the sound generated using airflow in industrial machinery, automotive and manufacturing applications. These Gast vacuum pumps have aluminium cylinders with stainless steel valves for corrosion resistance & durability. They feature rocking piston design to provide consistent flow throughout the service life and oil-less permanent lubrication to provide smooth and quiet operation. These Gast compressors feature 50 / 60Hz dual voltage motors for use with different current inputs. They have automatic thermal protection to break the circuit & prevent the burning of the vacuum pump / air compressors. Choose from a wide range of these air compressors, available in pressure ratings of 30, 100 and 125 psi.

StyleModelFull Load AmpsHPOverall LengthVoltagePrice (inc. GST)
A87R135-101-N270X2.6/1.41/47.75"100/120, 200/240 SGD 1182.04
B87R642-101R-N470X5.7/2.81/29.625"115/120, 230/240 SGD 1423.18
B87R645-101-N470X6.0/3.01/29.625"115/120, 230/240 SGD 1425.66
THOMAS PUMPS -

Piston Air Compressor / Vacuum Pumps

Thomas oilless air compressor / vacuum pumps are designed for generating a high flow of compressed air or creating a vacuum for controlling pneumatic equipment or systems. These piston air compressors feature die cast aluminium components and cylinders with stainless steel valves for maximum heat transfer and reliability over a long time, while the sandwich valves protect the valve seats from dust and other contaminants. They are permanently lubricated for smooth and quiet operation. Choose from a wide range of air compressor, available in permanent magnet and shaded pole motor variants on Raptor Supplies.

StyleModelFull Load AmpsHPOverall HeightOverall LengthOverall WidthPrice (inc. GST)
A617CA223.11/86 4/5"8"5" SGD 775.53
B2688VE443.21/37 1/10"9.625"6.75" SGD 1423.01
C688CE443.61/36 4/5"8"5.375" SGD 1097.10
B2688CE444.71/37 1/10"9.625"6.75" SGD 1127.90
StyleModelFull Load AmpsHPOverall LengthOverall WidthRPMPrice (inc. GST)
A2700737.3/3.61/215.5"11 39/64"1425 SGD 3472.82
A2700728/41/314.5"11 13/64"1725 SGD 2582.64
A27008010.6/5.33/414"11 13/64"1725 SGD 3845.53
GAST -

Piston Air Compressor/Vacuum Pump

StyleModelOverall WidthFull Load AmpsHPPhaseVoltageInlet SizeMotor TypeOutlet SizePrice (inc. GST)
A1LAA-251-M100X5.625"4.31/61115 VAC1/4" NPTSplit Phase1/4" NPT SGD 1356.20
B4LCB-251-M450X12"12/61/21115/230 VAC1/4" NPTCapacitor Start1/4" NPT SGD 2220.88
C5LCA-251-M550NGX12.25"16/83/41115/230 VAC1/4" NPTCapacitor Start1/4" NPT SGD 2377.48
D8HDM-251-M85312.38"6.6/3.323230/460 VAC3/8" NPTODP3/8" NPT SGD 4844.96
THOMAS PUMPS -

Piston Air Compressors

Thomas piston air compressors are suitable for powering pneumatic equipment in transportation and maintenance & repair applications. These air compressors feature a fully enclosed design for noise minimisation & ensuring protection against harsh industrial environments. Selected models come with permanently lubricated components, stainless steel valves and corrosion-resistant pump cylinders for long-term operation. Choose from a wide range of oil-less air compressors, available in capacitor start, permanent magnet, PMDC and shaded pole motor variants on Raptor Supplies.

StyleModelOverall LengthFinishFull Load AmpsOverall WidthRPMTemp. RangeThermal ProtectionVoltagePrice (inc. GST)
A405ADC38/127.5"Gray10.54.25"3450104 Degrees to 50 Degrees FYes12 VDC SGD 870.39
B27002411 9/16"Gray Paint265 13/16"180032 Degrees to 104 Degrees FNo12 VDC SGD 1891.68
B27004712 9/16"Gray Paint18.55 13/16"180032 Degrees to 104 Degrees FNo24 VDC SGD 1915.25
C27002512.625"Gray285.625"18000 Degrees to 104 Degrees FNo12 VDC SGD 2824.31
D617CA3213"Gray4.69"140050 Degrees to 104 Degrees FYes115 VAC SGD 810.43
GAST -

Piston Air Compressors

Gast piston air compressors are positive displacement compressors which employs a crankshaft-driven piston and cylinder to compress the air. These vacuum pumps feature aluminium cylinders and heads having thermally protected, shaded-pole motors with superior torque start windings. Choose from a wide range of these piston air compressors, available in electric, shaded pole, capacitor start and open motor types.

StyleModelOverall HeightDesignFull Load AmpsOverall LengthOverall WidthRPMTemp. RangeThermal ProtectionPrice (inc. GST)
A5HCD-10-M553-------- SGD 3352.17
B6LCF-46S-M616NEX-------- SGD 4045.70
C2HAH-19C-M322A-------- SGD 2731.87
D3HBB-19-M322A-------- SGD 3101.44
A4HCC-10-M450X-------- SGD 2467.33
E4LCB-21-M450X-------- SGD 3351.45
F5HCD-10-M550NGX-------- SGD 3351.35
E5LCA-22-M550NGX-------- SGD 3476.84
B5LCA-46S-M550GX-------- SGD 3690.52
G5LCA-10-M550NGX-------- SGD 2626.58
E6LCF-13-M616NEX-------- SGD 4066.50
H3LBA-32-M300AX-------- SGD 2979.52
I6HCA-10-M616NEX-------- SGD 3576.50
J7LDE-16-M750X-------- SGD 6352.13
K7HDD-10-M750X-------- SGD 5072.49
L8HDM-10-M853-------- SGD 5938.46
K7HDD-10-M853-------- SGD 5767.93
M1VAF-10-M100X-------- SGD 1611.84
I5HCE-10-M551X-------- SGD 3681.50
A3HBB-10-M300AX-------- SGD 2302.64
D3HBB-19-M323A-------- SGD 3388.68
C2HAH-10-M200X-------- SGD 1559.56
N120R689-P101-N800NX-------- SGD 5794.58
RFQ
O1LAA-46S-M100GX-------- SGD 2459.22
P1LAA-32-M100X-------- SGD 2664.09
StyleModelPrice (inc. GST)
A86R123-101-N170X SGD 1275.35
RFQ
A86R142-P001B-N270X SGD 1442.18
RFQ
WELCH -

Tank Vacuum System 1/2 HP 10 Gallon Tank

ModelItemPrice (inc. GST)
8150B-30AH8QNN SGD 8109.43
GAST -

Compressor, 0.25 hp, 1 Phase, 115V AC, 50 psi Max Continuous Pressure, 2.1 cfm

ModelItemPrice (inc. GST)
2LAF-10-M200XCN2TLY SGD 2147.80

Piston Air Compressor/Vacuum Pump

Piston air compressors or vacuum pumps are designed to provide compressed air as an energy source or transmit natural gas. Raptor Supplies offers a wide range of these compressors from brands like Welch, Gast and Thomas Pumps. They utilise a crankshaft-driven cylinder & piston to compress the air at high pressures and deliver torque up to 2 HP. These compressors are available in electric, shaded pole, capacitor start, open, permanent magnet and PMDC motor variants for prolonged life, having an oil-less or a rocking piston vacuum pump design.

Working Mechanism

  • Piston air compressor / vacuum pumps operations are based on the reciprocating piston within a cylinder principle.
  • The piston is linked to a crankshaft powered by an electric motor.
  • When the motor starts, the crankshaft begins to rotate, causing the piston within the cylinder to move back and forth.
  • The piston compresses the air in the cylinder as it moves towards the cylinder head. After that, the compressed air is stored in a pressure tank or reservoir.
  • When the piston moves away from the cylinder head, a vacuum is created in the cylinder to draw in the ambient air.

Frequently Asked Questions

Does temperature affect a piston air compressor / vacuum pump?

  • For air compressors, high temperatures can lead to a decrease in the compressor's efficiency and an increase in the risk of overheating.
  • For vacuum pumps, the main concern is low temperature which can lead to condensation and icing in the pump, this can cause damage to the internal parts of the pump and reduce its performance.

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