St40, Type 4, Containment duty – SANDPIPER ST40 User Manual
Page 3: Air-operated double diaphragm pump

st15dl4sm-rev0614
Models ST1½, ST40 Page 1
INTAKE/DISCHARGE PIPE SIZE
CAPACITY
AIR VALVE
SOLIDS-HANDLING
HEADS UP TO
DISPLACEMENT/STROKE
Quality System
ISO9001 Certified
Environmental
Management System
ISO14001 Certified
Containment Duty
ST1½
Type 4
ST40
Type 4
Air-Operated
Double Diaphragm Pump
ENGINEERING, PERFORMANCE
& CONSTRUCTION DATA
II 2GD T5
See page 18 & 19
for ATEX ratings
SANDPIPER
®
pumps are designed to be powered only by compressed air.
ST1½: 1½ (37.5mm) NPT (F)
ST40: 1½ (37.5MM) BSP (F)(Tapered)
0 to 90 gallons per minute
(0 to 340 liters per minute)
No-lube, no-stall
design
Occasional solids only.
Up to ¼ in. (6.3mm)
125 psi or 289 ft. of water
(8.8 Kg/cm
2
or 88 meters)
.37 Gallon / 1.29 liter
100
90
10(17)
20(34)
30(51) 40(68)
50(85)
60(102)
70(119)
80(136)
80
70
60
50
40
30
20
10
0
0
10
20
30
40
50
60
70
80
90
100 PSI
40 PSI
60 PSI
80 PSI
90(152.9)
0
50
100
150
200
250
300
350
0
1
2
3
4
5
6
7
PSI
BAR
20 PSI Air Inlet Pressure
US Gallons per minute
Liters per minute
CAPACITY
HEAD
AIR CONSUMPTION
SCFM (M
3
/hr)
MODEL ST1½/ST40 Performance Curve
Performance based on the following: elastomer fitted pump, flooded suction,
water at ambient conditions. The use of other materials and varying hydraulic
conditions may result in deviations in excess of 5%.
SANDPIPER® Containment Duty Pumps: Sealless Safety
This pump is part of the Containment Duty Pumps. It is specially fitted with PTFE diaphragms as well as elastomeric or elastomeric/PTFE driver diaphragms. The liquid-filled
spill chambers provide an additional chemically-resistant barrier, should a pumping diaphragm fail. The Spill Containment design gives the pump user advanced warning of
diaphragm failure, before pumpage can damage the air valve or be released into the work environment. Three optional leak detectors available for this model:
• Mechanical VIP Leak Detector* 031-025-000
• Electronic Leak Detector* (115V) 032-043-000
• Electronic Leak Detector* (220V) 032-043-000
The Containment Duty pumps offer many different levels of materials and spill monitoring devices designed to fit a variety of applications and budgets.
* Leak Detectors are not ATEX Compliant