Air Operated Diaphragm Pumps | Raptor Supplies Singapore

Air Operated Diaphragm Pumps

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Air operated diaphragm pumps are used in chemical processing for transferring corrosive and abrasive fluids in wastewater treatment for handling sludges and slurries in the pharmaceutical industry... Read More

FLOJET -

Double Diaphragm Pumps

StyleModelBall MaterialBody MaterialDiaphragm MaterialHeightInlet/Outlet SizeLengthMax. FlowMax. Operating PressurePrice (inc. GST)
AG575215Z-PolypropyleneSantoprene(R)5.75"1/2"4.5"5 gpm80 psi SGD 403.87
BN5100020GPolypropolyneAcetalViton(R)4"3/8"6"2.5 gpm75 psi SGD 494.20
AG573215ZViton(R)PolypropyleneViton(R)5.75"1/2"4.5"5.0 gpm80 psi SGD 544.65
ARO -

Diaphragm Pumps

ARO's ATEX-certified diaphragm pumps are widely used to pump various light to medium viscosity fluids in chemical processing industries and water / wastewater treatment plants. These ARO pumps feature an unbalanced valve design that eliminates the occurrence of valve centering and pump stall-out even when the inlet pressure is very low. The company manufactures metallic and non-metallic electric diaphragm pumps in different sizes, operating pressures and diaphragm materials.

StyleModelBall MaterialBody MaterialConnection StyleDiaphragm MaterialHeightInlet/Outlet SizeLengthMax. Dia. SolidsPrice (inc. GST)
A650717-CAcetalAluminumNPTViton(R)9"1"14"1/8" SGD 3876.10
BPD01P-HPS-0NA-ANeoprenePolypropyleneNPTSantoprene(R)6 51/64"1/4"7 13/64"1/16" SGD 972.29
CPD03P-APS-0NANeoprenePolypropyleneNPTSantoprene(R)9 5/16"3/8"7 15/16"1/16" SGD 1190.58
DPD10A-AAP-GGGNitrileAluminumNPTNitrile12.437"1"12 5/16"1/8" SGD 3720.64
CPD03P-APS-0JCNitrilePolypropyleneNPTHytrel9 5/16"3/8"7 15/16"1/16" SGD 1181.93
EPD30A-AAP-GGG-CNitrileAluminumNPTNitrile32"3"23.625"3/8" SGD 9795.13
FPD15A-AAP-GGGNitrileAluminumNPTNitrile19.63"1.5"14.875"1/4" SGD 4677.33
GPD20A-AAP-GGG-BNitrileAluminumNPTNitrile26.25"2"19.75"1/4" SGD 6541.64
HPW10A-AAP-GGGNitrileAluminumNPTNitrile16.875"1.5"11 11/16"1/8" SGD 3423.01
GPD20A-AAP-STT-BPTFEAluminumNPTPTFE26.25"2"19.75"1/4" SGD 8744.71
IPD15A-ASS-STTPTFEStainless SteelNPTPTFE19.63"1.5"14 5/16"1/4" SGD 14766.55
JPD15P-FPS-PTTPTFEPolypropyleneFlangePTFE24.437"1.5"20 15/16"1/4" SGD 11264.32
IPD30A-ASS-STT-CPTFEStainless SteelNPTPTFE32"3"23.125"3/8" SGD 44778.44
KPD15P-YPS-PTTPTFEPolypropyleneFlangePTFE24 9/16"1.5"18 9/16"1/4" SGD 11267.31
EPD30A-AAP-FTT-CPTFEAluminumNPTPTFE32"3"23.625"3/8" SGD 13142.04
LPD10P-YPS-PTTPTFEPolypropyleneFlangePTFE14 5/16"1"14.187"1/8" SGD 3484.41
EPD20A-ASS-STT-BPTFEStainless SteelNPTPTFE26.25"2"19.75"1/4" SGD 22625.59
MPD20P-FPS-PTTPTFEPolypropyleneFlangePTFE31.875"2"24 13/16"1/4" SGD 15948.29
BPD01E-HDS-DTT-APTFEGroundable PolypropyleneNPTPTFE6 51/64"1/4"7 13/64"1/16" SGD 1719.76
NPD10R-ASS-STTPTFEStainless SteelNPTPTFE12.437"1"12 5/16"1/8" SGD 10734.65
BPD01P-HPS-PTT-APTFEPolypropyleneNPTPTFE6 51/64"1/4"7 13/64"1/16" SGD 1224.95
FPD15A-AAP-FTTPTFEAluminumNPTPTFE19.63"1.5"14.875"1/4" SGD 5915.61
NPD10A-ASS-STTPTFEStainless SteelNPTPTFE12.437"1"12 5/16"1/8" SGD 8374.37
HPW10A-AAP-FTTPTFEAluminumNPTPTFE16.875"1.5"11 11/16"1/8" SGD 4850.32
OPD10P-FPS-PTTPTFEPolypropyleneFlangePTFE16"1"16"1/8" SGD 3484.41
DAYTON -

Air Operated Double Diaphragm Pumps

Dayton double diaphragm pumps are suitable for general pump transfer, recirculation, spraying, dispensing, filling, fuel evacuation, low scheming transfer and rough metering dewatering applications. They feature cast iron construction for wear resistance & vibration dampening, and spring assisted air valves that do not require lubrication for rapid discharge of the media present in pipelines. These pumps can run dry and have the capability to pump solvents, slurries & high viscosity liquids such as waste oils & paints. They have NPT, flange & Tri-Clamp connections for secure seals and transportation of liquids with minimal risk of contamination. Choose from a broad range of these pumps, available in PTFE, Buna-N, santoprene (R) and EPDM ball variants.

StyleModelBall MaterialBody MaterialConnection StyleDiaphragm MaterialHeightInlet/Outlet SizeLengthMax. Dia. SolidsPrice (inc. GST)
A22A592Buna NAluminumNPTBuna N12.625"3/4"8"1/16" SGD 2410.06
B22A594Buna NAluminumNPTBuna N17.25"1-1/2" x 1-1/4"8.5"3/16" SGD 2897.15
C6PY46Buna NAluminumFlangedBuna N30.75"2"17.75"5/16" SGD 4263.28
D6PY45Buna NAluminumFlangedBuna N28"1.5"16.25"9/32" SGD 2916.28
E6PY44Buna NAluminumNPTBuna N15"1"11 19/64"3/16" SGD 1634.10
F6PY43Buna NAluminumNPTBuna N12 9/16"3/4"9 51/64"1/16" SGD 1287.65
G6PY42Buna NAluminumNPTBuna N10 43/64"1/2"8 21/32"1/32" SGD 1752.09
H22A595Buna NAluminumFlangedBuna N4.75"3"16.5"13/32" SGD 7532.27
I34TJ47Buna NAluminumNPT/FlangeBuna N32.5"2"14"2" SGD 7202.12
J6PY35EPDMPolypropyleneNPTSantoprene(R)14.5"3/4"12.5"1/16" SGD 1563.45
K3HJW5EPDMPolypropyleneFlangedSantoprene(R)29.625"1.5"16"9/32" SGD 6149.79
F3HJW8EPDMAluminumNPTSantoprene(R)12 9/16"3/4"9 51/64"1/16" SGD 1494.81
L3HJW6EPDMPolypropyleneFlangedSantoprene(R)32 19/64"2"18 37/64"5/16" SGD 8973.51
F6PY47EPDM316 Stainless SteelNPTSantoprene(R)12 9/16"3/4"9 51/64"1/16" SGD 2595.25
M6PY48EPDM316 Stainless SteelNPTSantoprene(R)15"1"11 19/64"3/16" SGD 4029.70
N6PY36EPDMPolypropyleneNPTSantoprene(R)16.875"1"14.5"3/16" SGD 1847.54
O3HJW2EPDMKynar(R)NPTSantoprene(R)16.875"1"14.5"3/16" SGD 4127.47
C3HJX2EPDMAluminumFlangedSantoprene(R)30.75"2"17.75"5/16" SGD 4350.56
D3HJX1EPDMAluminumFlangedSantoprene(R)28"1.5"16.25"9/32" SGD 2824.46
M3HJW9EPDMAluminumNPTSantoprene(R)15"1"11 19/64"3/16" SGD 2273.82
G3HJW7EPDMAluminumNPTSantoprene(R)10 43/64"1/2"8 21/32"1/32" SGD 1269.11
P22A605PTFE316 Stainless SteelTri-ClampPTFE12.625"1"8"1/16" SGD 7363.93
G6PY49PTFEAluminumNPTPTFE10 43/64"1/2"8 21/32"1/32" SGD 2079.42
G6PY51PTFE316 Stainless SteelNPTPTFE9.75"1/2"8 5/16"1/32" SGD 3130.27
Q22A607PTFE316 Stainless SteelTri-ClampPTFE15.125"1.5"8.5"3/16" SGD 9351.15
STANDARD PUMP -

Double Diaphragm Pumps

Standard Pump double diaphragm pumps (also called AODD pumps) are used to transport sludges, slurries, abrasives and shear sensitive fluids using either a consistent air or natural gas supply. The air pressure in these pumps acts along the entire surface of the diaphragm, thereby keeping it balanced while pumping and substantially extending the pump life as compared to mechanically operated diaphragm pumps. They come equipped with stainless-steel 316 components and Tri-clamp intake / discharge mechanism, as well as facilitate quick assembly / disassembly for pump maintenance and cleaning. Choose from a wide range of these double diaphragm pumps avaialble in 100 and 120 PSI maximum operating pressure variants on Raptor Supplies.

StyleModelConnection StyleDiaphragm MaterialHeightInlet/Outlet SizeLengthMax. Dia. SolidsMax. FlowMax. Temp.Price (inc. GST)
ASPSN15NPT1-1/2" Tri-ClampPTFE31.5"1.5"18.5"5/8"51 gpm220 Degrees F-
RFQ
ASPSN15NPS1-1/2" Tri-ClampSantoprene(R)31.5"1.5"18.5"5/8"86 gpm275 Degrees F SGD 19176.57
ASPSN20NPT2" Tri-ClampPTFE34.75"2"18.5"5/8"147 gpm220 Degrees F SGD 32141.05
ASPSN20NPS2" Tri-ClampSantoprene(R)34.75"2"18.5"5/8"179 gpm275 Degrees F SGD 26739.17
BSP3A20NPT2" Tri-ClampSantoprene(R)34.75"2"18.5"5/8"147 gpm275 Degrees F SGD 33716.57
CSPFP30NPT3" Tri-ClampPTFE32"3"21.5"3/8"180 GPM220 Degrees F SGD 26063.94
CSPFP30NPS3" Tri-ClampSantoprene(R)32"3"21.5"3/8"234 gpm275 Degrees F SGD 24164.29
SANDPIPER -

Double Diaphragm Pumps

Sandpiper double diaphragm pumps (also called AODD pumps) are operated by air / natural gas and used for transporting sludges, slurries, abrasives and shear sensitive fluids. The air pressure in these pumps acts along the entire surface of the diaphragm, keeping it balanced while pumping, that substantially extends pump life as compared to that of mechanically operated diaphragm pumps. Ideal for on-demand intermittent jobs, these AODD pumps can be safely dry ran & deadheaded without causing any damage to the pump or system. Self-priming and high vacuum capable, Sandpiper pumps can continuously pump fluids even if situated out of the pit and offer a maximum suction lift of 9.8 m. Also, their flooded suction feature allows for outdoor mounting of the pump & is mostly preferred for pumping viscous fluids. As they are safely submersible and utilise compressed air as their power source rather than electricity, these pumps are suitable for use in hazardous areas. Offering flow rates of 4, 42, 106 and 135 GPM, Sandpiper double diaphragm pumps are available in both NPT and flange-type connections. A screened inlet option is available for making the filtration process more efficient when the pumps are submerged under water, where sediments and debris are very common.

StyleModelAgency ComplianceBall MaterialBody MaterialConnection StyleDiaphragm MaterialHeightHousing MaterialInlet/Outlet SizePrice (inc. GST)
AS20B1ABBANS000-Santoprene(R)AluminumNPTSantoprene(R)26 5/16"-2" SGD 5173.59
BSB1 SS5A-Santoprene(R)AluminumNPTSantoprene(R)14.437"-1" SGD 3190.59
CHDF2 DP6I-Santoprene(R)Cast-IronNPTSantoprene(R)20 5/16"-2" SGD 6633.29
DG1FB1STTXNSX00-PTFEStainless SteelNPTPTFE - Buna Backup12 23/32"-1" SGD 6103.28
EHDF1 DB2A-BunaAluminumNPTBuna15 11/16"-1" SGD 4255.03
FS20B1I1EANS000-Santoprene(R)Cast-IronNPTSantoprene(R)26 5/16"-2" SGD 5258.81
AS20B1A1EANS000-Santoprene(R)AluminumNPTSantoprene(R)26 5/16"-2" SGD 4498.77
GS05B1S2TANS000-PTFEStainless SteelNPTPTFE - Santoprene Backup10.375"-1/2" SGD 7492.90
HS1FB1ABWANS000-BunaAluminumNPTBuna12 23/32"-1" SGD 2623.77
HS1FB1A1WANS000-Santoprene(R)AluminumNPTSantoprene(R)12 23/32"-1" SGD 2998.60
IS05B1A2TANS000-PTFEAluminumNPTPTFE - Santoprene Backup11.5"-1/2" SGD 3037.05
IS05B1ABWANS000-BunaAluminumNPTBuna11.5"-1/2" SGD 2309.24
JS1FB3P2PPNI000-PTFEPolypropyleneNPTPTFE - Santoprene Backup21"-1" SGD 4001.15
RFQ
JS1FB3P1PPNI000-Santoprene(R)PolypropyleneNPTSantoprene(R)21"-1" SGD 3391.95
KS07B1P1PPNS000-Santoprene(R)PolypropyleneNPTSantoprene(R)13 11/32"-3/4" SGD 2284.42
LSA3M DS2II-Santoprene(R)Cast-IronFlangeSantoprene(R)30.25"-3" SGD 14548.91
CHDF2 DP6A-Santoprene(R)AluminumNPTSantoprene(R)20 5/16"-2" SGD 5916.50
FS20B1I2TANS000-PTFECast-IronNPTPTFE - Santoprene Backup26 5/16"-2" SGD 6794.22
MS15B1I2TANS000-PTFECast-IronNPTPTFE - Santoprene Backup21 37/64"-1.5" SGD 6427.25
MS15B1I1WANS000-Santoprene(R)Cast-IronNPTSantoprene(R)21 37/64"-1.5" SGD 5032.33
NS1FB1I2TANS000-PTFECast-IronNPTPTFE - Santoprene Backup12 23/32"-1" SGD 3892.28
NS1FB1I1WANS000-Santoprene(R)Cast-IronNPTSantoprene(R)12 23/32"-1" SGD 3525.95
OS05B2G2TXNS000-PTFEConductive AcetalNPTPTFE - Santoprene Backup11 5/16"-1/2" SGD 3593.27
RFQ
PS05B2G1TXNS000-Santoprene(R)Conductive AcetalNPTSantoprene(R)11 5/16"-1/2" SGD 3151.84
JS1FB3PBPPNI000-BunaPolypropyleneNPTBuna21"-1" SGD 3391.95
ARO -

Double Diaphragm Pumps

StyleModelBall MaterialBody MaterialConnection StyleDiaphragm MaterialHeightInlet/Outlet SizeLengthMax. Dia. SolidsPrice (inc. GST)
A66605J-388--FNPTPolyurethane11.3"1/2"8.4"- SGD 1732.78
B650715-CAcetalAluminumNPTNitrile11.75"3/4" / 1"15.25"1/8" SGD 2702.96
C666150-362-CAcetalAluminumNPTNitrile14.5"1.5"23.875"1/4" SGD 3774.79
C666100-362-CAcetalAluminumNPTNitrile-1"-1/8" SGD 3003.27
D650719-CAcetalAluminumNPTViton(R)19 13/16"2"18.375"1/4" SGD 6743.87
E650718-CAcetalAluminumNPTViton(R)14.5"1.5"23.75"1/4" SGD 4774.40
FPD07R-AAS-PCCHytrelAluminumNPTHytrel11.875"3/4"9 9/32"3/32" SGD 2474.78
GPD03P-ADS-DCCHytrelAcetalNPTHytrel10.875"3/8"10"1/16" SGD 1553.91
FPD03P-AES-DCCHytrelAcetalNPTHytrel10.875"3/8"10"1/16" SGD 1688.46
H6662B3-311-CNeoprenePolypropyleneFlangedNeoprene24.63"2"19 23/32"1/4" SGD 9724.50
I6661U3-311-CNeoprenePolypropyleneFlangedNeoprene24.63"1.5"19 23/32"1/4" SGD 6580.61
J666300-G22-CNitrileAluminumNPTNitrile32 9/32"3"22 7/32"3/8" SGD 8818.09
K66M300-122-CNitrileAluminumNPTNitrile32.625"3"26 13/16"1" SGD 10077.11
LPD05R-AAS-PGG-BNitrileAluminumNPTNitrile11.75"1/2"8 7/32"3/32" SGD 1980.51
K66M250-122-CNitrileAluminumNPTNitrile26 23/32"2"25.5933/4" SGD 5870.13
K66M150-122-CNitrileAluminumNPTNitrile19 15/16"1.5"17 3/32"1/2" SGD 4109.72
FPD05P-ARS-PGG-BNitrilePolypropyleneNPTNitrile10.875"1/2"10"3/32" SGD 1673.19
M666250-G22-CNitrileAluminumNPTNitrile-2"-1/4" SGD 4964.05
N6661AJ-322-CNitrilePolypropyleneNPTNitrile-1"-1/8" SGD 2861.69
A66605J-344PTFEPolypropyleneNPTPTFE7.5"1/2"11.75"3/32" SGD 2161.97
N6661AJ-344-CPTFEPolypropyleneNPTPTFE-1"-1/8" SGD 3436.12
I6661U3-344-CPTFEPolypropyleneFlangedPTFE24.63"1.5"19 23/32"1/4" SGD 8296.81
O666161-244-CPTFEStainless SteelNPTPTFE-1.5"-1/4" SGD 10430.74
C666100-244-CPTFEAluminumNPTPTFE14"1"9"1/8" SGD 3792.75
C666111-244-CPTFEStainless SteelNPTPTFE-1"-1/8" SGD 7092.04
VERSA-MATIC -

Double Diaphragm Pumps

Versa-Matic air-operated diaphragm pumps have a robust leak-free bolted design which reduces maintenance downtime and are self-priming to handle solids up to 3 inches. These units provide an an ideal combination of flow, size and portability as compared to other pump models, with a maximum flow rate of 163 gpm (617 lpm). They further feature the patented Elima-Matic air valve system for a no stalling, lube-free performance and are available in 1/4 inch, 3/16 inch and 3/8 inch diameter variants on Raptor Supplies.

StyleModelHeightInlet/Outlet SizeLengthMax. Dia. SolidsWidthPrice (inc. GST)
AE4AA2R22018"1-1/2" / 1-1/4"11.5"3/16"14.25" SGD 3688.08
BE2AA2R220C-ATEX26.75"2"13.5"1/4"16.5" SGD 5685.19
CE3AA2R220C-ATEX32"3"15"3/8"20" SGD 7467.88
BINKS -

DBL Diaphragm Pumps

StyleModelCapacityPrice (inc. GST)
AGEM2-P2D10605 gal SGD 4166.64
BGEM2-P2D1D605 gal. SGD 5531.84
CGEM2-W2D20705 gal. SGD 4216.19
SANDPIPER -

Double Diaphragm Pump, Air, Polypropylene, Bolt, 2 Inch Fluid Connection Size, Flange

ModelItemPrice (inc. GST)
S20B3P2PPUS000.CT9TDM SGD 10893.79
SANDPIPER -

Double Diaphragm Pump, Air, Cast Iron, Bolt, 2 Inch Fluid Connection Size, Npt, Santoprene

ModelItemPrice (inc. GST)
HDB2,DS4CI.CT9TDD SGD 5976.41
SANDPIPER -

Double Diaphragm Pump, Air, Cast Iron, Bolt, 3 Inch Fluid Connection Size, Npt, Ptfe, Ptfe

ModelItemPrice (inc. GST)
S30B1I2TANS600.CT9TDE SGD 10863.08
SANDPIPER -

Double Diaphragm Pump, Air, Cast Iron, Bolt, 3 Inch Fluid Connection Size, Npt, Santoprene

ModelItemPrice (inc. GST)
S30B1I1EANS600.CT9TDF SGD 9227.86
SANDPIPER -

Double Diaphragm Pump, Air, Polypropylene, Bolt, 1 1/2 Inch Fluid Connection Size, Flange

ModelItemPrice (inc. GST)
S15B3P2PPUS000.CT9TDG SGD 7884.37
SANDPIPER -

Double Diaphragm Pump, Air, Polypropylene, Bolt, 1 1/2 Inch Fluid Connection Size, Flange

ModelItemPrice (inc. GST)
S15B3P1PPUS000.CT9TDH SGD 6755.84
SANDPIPER -

Double Diaphragm Pump, Air, Polypropylene, Bolt, 1/2 Inch Fluid Connection Size, Npt, Ptfe

ModelItemPrice (inc. GST)
S05B2P1TPNI000.CT9TDK SGD 1658.25
SANDPIPER -

Double Diaphragm Pump, Air, Polypropylene, Bolt, 1/2 Inch Fluid Connection Size, Npt, Ptfe

ModelItemPrice (inc. GST)
S05B2P2TPNI000.CT9TDL SGD 2042.11
SANDPIPER -

Double Diaphragm Pump, Air, Polypropylene, Bolt, 2 Inch Fluid Connection Size, Flange, Npt

ModelItemPrice (inc. GST)
S20B3P1PPUS000.CT9TDN SGD 9680.81
SANDPIPER -

Double Diaphragm Pump, Air, Aluminum, Bolt, 3 Inch Fluid Connection Size, Npt, Ptfe, Ptfe

ModelItemPrice (inc. GST)
S30B1A2TANS600.CT9TDB SGD 9404.43
SANDPIPER -

Double Diaphragm Pump, Air, Polypropylene, Bolt, 2 Inch Fluid Connection Size, Npt, Buna-N

ModelItemPrice (inc. GST)
HD20F1PBSPNS000.CT9TDP SGD 6462.70
SANDPIPER -

Double Diaphragm Pump, Air, Polypropylene, Bolt, 2 Inch Fluid Connection Size, Npt, Epdm

ModelItemPrice (inc. GST)
HD20F1PJSPNS000.CT9TDQ SGD 6462.70
SANDPIPER -

Double Diaphragm Pump, Air, Polypropylene, Bolt, 1/2 Inch Fluid Connection Size, Npt

ModelItemPrice (inc. GST)
S05B2PBTPNI000.CT9TDJ-
RFQ
12...89

Air Operated Diaphragm Pumps

Air operated diaphragm pumps are designed to pump thick slurries & solid-laden liquids in applications such as dewatering and mining. Raptor Supplies offers a wide range of air operated diaphragm pumps from brands like Aro, Sandpiper, Flojet, Versa-Matic. Standard-duty Sandpiper air-diaphragm pumps are ideal for dewatering & pumping slurries, solvents, abrasive fluids, weak acids & suspended solids in petrochemical and food processing plants. These pumps are designed to operate on a continuous supply of compressed air and feature aluminium / cast iron / stainless steel / non-metallic construction to ensure structural rigidity. The brand's self-priming double-diaphragm pumps feature ball check valves for withstanding consistent fluid flow and connecting rods for reliable & consistent diaphragm control. These all-bolted, shear-sensitive air diaphragm pumps are offered in flange and NPT connection styles. Air-operated double-diaphragm pumps from Versa-Matic are ideal for easy & safe transport of chemicals & other fluids. These diaphragm pumps feature leak-free bolted construction for superior chemical resistance, with multi-position foot mounts & multiple ported manifolds offering installation flexibility. They can withstand temperatures up to 275 degrees F and have operating pressures ranging between 100 & 125 psi. Raptor Supplies offers a wide range of air operated diaphragm pumps in heights ranging from 10-3/64 to 16-61/64 inches.

Working Mechanism

  • These air operated diaphragm pumps separate the liquid chamber from the air chamber within the pump.
  • Inlet and outlet air valves control the flow of compressed air into the air chamber of the pump. When the pump is at rest, both diaphragms are in a relaxed state, and the inlet valve is open while the outlet valve is closed.
  • To begin the pumping cycle, compressed air is introduced into the air chamber behind one of the diaphragms. This causes the diaphragm to flex inward, creating a vacuum within the liquid chamber. The vacuum draws liquid into the pump through the inlet check valve.
  • As one diaphragm flexes inward and draws in liquid, the opposite diaphragm simultaneously expands outward, pushing the liquid out through the outlet check valve. This movement creates a pulsating flow of liquid.
  • Once the first diaphragm completes its inward stroke and the liquid is discharged, the air valves switch positions. The inlet valve closes, and the outlet valve opens, allowing compressed air to act on the second diaphragm.
  • The process repeats as the second diaphragm flexes inward, creating a vacuum to draw in more liquid, while the first diaphragm pushes out the previously drawn liquid. This alternating action creates a continuous flow of liquid.
  • The double diaphragm design ensures balance and symmetry in the pumping process. As one diaphragm contracts, the other expands, minimizing stress and wear on the diaphragms and providing smooth and consistent flow.

Features

Dayton Double Diaphragm Pumps :

  • These air operated double diaphragm (AODD) pumps have cast iron construction for structural rigidity and wear resistance.
  • They are equipped with spring assisted air valves that do not require lubrication for rapid discharge of the media present in pipelines.
  • These air operated diaphragm pumps can run dry and have the capability to pump solvents, slurries & high viscosity liquids such as waste oils & paints.
  • They feature NPT, flange and tri-clamp connections for secure seals and transportation of liquids with minimal risk of contamination.

Sandpiper Double Diaphragm Pumps :

  • These AODD pumps act along the entire surface of the diaphragm, keeping it balanced while pumping, which substantially extends pump life as compared to that of mechanically operated diaphragm pumps.
  • They come with a flooded suction feature that allows outdoor mounting and pumping of viscous fluids.
  • These air operated diaphragm pumps offer flow rates of 4, 42, 106 and 135 GPM for dispensing fluids.
  • They provide a screened inlet option for making the filtration process efficient when the pumps are submerged under water, where sediments and debris are very common.

ARO Double Diaphragm Pumps :

  • They are ATEX-certified diaphragm pumps for medium-viscosity fluids used in chemical processing industries and water / wastewater treatment plants.
  • These ARO pumps feature an unbalanced valve design that eliminates the occurrence of valve centring and pump stall-out even when the inlet pressure is very low.

Frequently Asked Questions

Can these pumps be used for metering or dosing application?

Yes, they can be used for metering. For precise dosing, accessories like pulsation dampeners and stroke adjustment controls may be required.

How to maintain these air operated diaphragm pumps?

Routine maintenance includes inspecting diaphragms for wear, checking valves, and tightening connections. Lubrication may be necessary, depending on the pump design.

Can these Sandpiper pumps be used in dry run situations?

These AODD pumps can be safely dry-run and deadheaded without causing any damage to the pump or system.

What is the maximum suction height that these double diaphragm pumps offer?

Sandpiper pumps can continuously pump fluids even if situated out of the pit and offer a maximum suction lift of 9.8 m.

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