Harwood Engineering Company, Inc.
Controlled Clearance Free Piston Gages
20,000 psi or Metric Equivalent
LB Version
KG Version
MD Version
DWT-50
DWT-25 KG
DWT-25 MD
DWT-75
DWT-35 KG
DWT-35 MD
DWT-100
DWT-45 KG
DWT-45 MD
Features
The austenitic stainless steel weights are:
Insensitive to earth's magnetic field
Noncorroding
Machined to ± 0.01%
Console Provides:
Convenient storage stack
Reservoirs
Valves
Jacket pressure gage
Electric motor for piston rotation
Auxillary hand pump for use in large volume system
Built in fine adjusting screw pump
Ports are Harwood Female high pressure 4L ports (
9
/
16
-18 threads). A wide choice of fluid from tapwater (special) to oil may be used.
DWT-50
Maximum Pressure, psi
Minimum Pressure (Tare), psi
Nominal Piston Diameter, inch
Nominal Piston Area, in
2
Uncertainty of Nominal Area as Supplied, %
Part # of Piston Assembly
Part # of Cylinder Assembly
10,000
200
0.079788
0.005
0.0125
B-3497
B-3498
6,000
120
0.103006
0.00833..
0.0097
B-3500
B-3501
5,000
100
0.112838
0.01
0.0089
B-3502
B-3503
3,000
60
0.145673
0.01666..
0.0069
B-3504
B-3505
2,500
50
0.159577
0.02
0.0063
B-3506
B-3507
2,000
40
0.178412
0.025
0.0056
B-3508
B-3509
1,000
20
0.252313
0.05
0.0040
B-3510
B-3511
500
10
0.356825
0.1
0.0028
B-3512
B-3513
weights supplied: 1-20 lb., 2-10 lb., 1-5 lb., 4-1 lb., and a 1 lb. tare weight
DWT-75
Maximum Pressure, psi
Minimum Pressure (Tare), psi
Nominal Piston Diameter, in.
Nominal Piston Area, in
2
Uncertainty of Nominal Area as Supplied, %
Part # of Piston Assembly
Part # of Cylinder Assembly
15,000
200
0.079788
0.005
0.0125
B-3497
B-3498
9,000
120
0.103006
0.00833..
0.0097
B-3500
B-3501
7,500
100
0.112838
0.01
0.0089
B-3502
B-3503
4,500
60
0.145673
0.0166..
0.0069
B-3504
B-3505
3,750
50
0.159577
0.02
0.0063
B-3506
B-3507
3,000
40
0.178412
0.025
0.0056
B-3508
B-3509
1,500
20
0.252313
0.05
0.0040
B-3510
B-3511
750
10
0.356825
0.1
0.0028
B-3512
B-3513
weights supplied: 2-20 lb., 2-10 lb., 2-5 lb., 4-1 lb., and a 1 lb tare weight
DWT-100
Maximum Pressure, psi
Minimum Pressure (Tare), psi
Nominal Piston Diameter, in.
Nominal Piston Area, in
2
Uncertainty of Nominal Area as Supplied, %
Part # of Piston Assembly
Part # of Cylinder Assembly
20,000
200
0.079788
0.005
0.0125
B-3497
B-3498
12,000
120
0.103006
0.00833..
0.0097
B-3500
B-3501
10,000
100
0.112838
0.01
0.0089
B-3502
B-3503
6,000
60
0.145673
0.01666..
0.0069
B-3504
B-3505
5,000
50
0.159577
0.02
0.0063
B-3506
B-3507
4,000
40
0.178412
0.025
0.0056
B-3508
B-3509
2,000
20
0.252313
0.05
0.0040
B-3510
B-3511
1,000
10
0.356825
0.1
0.0028
B-3512
B-3513
weights supplied: 3-20 lb., 3-10 lb., 1-5 lb., 4-1 lb., and a 1 lb. tare weight
DWT-25 KG
Maximum Pressure, Kg/cm
2
Minimum Pressure (Tare), Kg/cm
2
Nominal Piston Diameter, cm
Nominal Piston Area, cm
2
Uncertainty of Nominal Area as Supplied, %
Part # of Piston Assembly
Part # of Cylinder Assembly
750
15
0.206012
0.03333..
0.0123
B-6973
B-6974
625
12.5
0.225676
0.04
0.0113
B-6975
B-6976
500
10
0.252313
0.05
0.0101
B-6977
B-6978
375
7.5
0.291346
0.06666..
0.0087
B-6979
B-6980
250
5
0.356824
0.1
0.0071
B-6981
B-6982
125
2.5
0.504627
0.2
0.0050
B-6983
B-6984
50
1
0.797885
0.5
0.0032
B-6985
B-6986
weights supplied: 1-10 kg, 2-5 kg, 2-2 kg, 1-1 kg, 1-0.5 kg, 2-0.2 kg, 1-0.1 kg, and a 0.5 kg tare weight
DWT-35 KG
Maximum Pressure, Kg/cm
2
Minimum Pressure (Tare), Kg/cm
2
Nominal Piston Diamter, cm
Nominal Piston Area, cm
2
Uncertainty of Nominal Area as Supplied, %
Part # of Piston Assembly
Part # of Cylinder Assembly
1050
15
0.206012
0.03333..
0.0123
B-6973
B-6974
875
12.5
0.225676
0.04
0.0113
B-6975
B-6976
700
10
0.252313
0.05
0.0101
B-6977
B-6978
525
7.5
0.291346
0.06666..
0.0087
B-6979
B-6980
350
5
0.356824
0.1
0.0071
B-6981
B-6982
175
2.5
0.504627
0.2
0.0050
B-6983
B-6984
70
1
0.797885
0.5
0.0032
B-6985
B-6986
weights supplied: 2-10 kg, 2-5 kg, 2-2 kg, 1-1 kg, 1-0.5 kg, 2-0.2 kg, 1-0.1 kg, and a 0.5 kg tare weight
DWT-45 KG
Maximum Pressure, Kg/cm
2
Minimum Pressure (Tare), Kg/cm
2
Nominal Piston Diameter, cm
Nominal Piston Area, cm
2
Uncertainty of Nominal Area as Supplied, %
Part # of Piston Assembly
Part # of Cylinder Assembly
1350
15
0.206012
0.03333..
0.0123
B-6973
B-6974
1125
12.5
0.225676
0.04
0.0113
B-6975
B-6976
900
10
0.252313
0.05
0.0101
B-6977
B-6978
675
7.5
0.291346
0.06666..
0.0087
B-6979
B-6980
450
5
0.356824
0.1
0.0071
B-6981
B-6982
225
2.5
0.504627
0.2
0.0050
B-6983
B-6984
90
1
0.797885
0.5
0.0032
B-6985
B-6986
weights supplied: 3-10 kg, 2-5 kg, 2-2 kg, 1-1 kg, 1-0.5 kg, 2-0.2 kg, 1-0.1 kg, and a 0.5 kg tare weight
DWT-25 MD
Maximum Pressure, bars
Minimum Pressure (Tare), bars
Nominal Piston Diameter, cm
Nominal Piston Area, cm
2
Uncertainty of Nominal Area as Supplied, %
Part # of Piston Assembly
Part # of Cylinder Assembly
750
15
0.206012
0.03333..
0.0123
B-6973
B-6974
625
12.5
0.225676
0.04
0.0113
B-6975
B-6976
500
10
0.252313
0.05
0.0101
B-6977
B-6978
375
7.5
0.291346
0.06666..
0.0087
B-6979
B-6980
250
5
0.356824
0.1
0.0071
B-6981
B-6982
125
2.5
0.504627
0.2
0.0050
B-6983
B-6984
50
1
0.797885
0.5
0.0032
B-6985
B-6986
weights supplied: 1-10 MD, 2-5 MD, 2-2 MD, 1-1 MD, 1-0.5 MD, 2-0.2 MD, 1-0.1 MD, and a 0.5 MD tare weight
DWT-35 MD
Maximum Pressure, bars
Minimum Pressure (Tare), bars
Nominal Piston Diameter, cm
Nominal Piston Area, cm
2
Uncertainty of Nominal Area as Supplied, %
Part # of Piston Assembly
Part # of Cylinder Assembly
1050
15
0.206012
0.03333..
0.0123
B-6973
B-6974
875
12.5
0.225676
0.04
0.0113
B-6975
B-6976
700
10
0.252313
0.05
0.0101
B-6977
B-6978
525
7.5
0.291346
0.06666..
0.0087
B-6979
B-6980
350
5
0.356824
0.1
0.0071
B-6981
B-6982
175
2.5
0.504627
0.2
0.0050
B-6983
B-6984
70
1
0.797885
0.5
0.0032
B-6985
B-6986
weights supplied: 2-10 MD, 2-5 MD, 2-2 MD, 1-1 MD, 1-0.5 MD, 2-0.2 MD, 1-0.1 MD, and a 0.5 MD tare weight
DWT-45 MD
Maximum Pressure, bars
Minimum Pressure (Tare), bars
Nominal Piston Diameter, cm
Nominal Piston Area, cm
2
Uncertainty of Nominal Area as Supplied, %
Part # of Piston Assembly
Part # of Cylinder Assembly
1350
15
0.206012
0.03333..
0.0123
B-6973
B-6974
1125
12.5
0.225676
0.04
0.0113
B-6975
B-6976
900
10
0.252313
0.05
0.0101
B-6977
B-6978
675
7.5
0.291346
0.06666..
0.0087
B-6979
B-6980
450
5
0.356824
0.1
0.0071
B-6981
B-6982
225
2.5
0.504627
0.2
0.0050
B-6983
B-6984
90
1
0.797885
0.5
0.0032
B-6985
B-6986
weights supplied: 3-10 MD, 2-5 MD, 2-2 MD, 1-1 MD, 1-0.5 MD, 2-0.2 MD, 1-0.1 MD, and a 0.5 MD tare weight
Harwood Engineering Company, Incorporated – © May, 1999
455 South Street, Walpole, Massachusetts 02081
phone: 508-668-3600
fax: 508-660-2276
http://www.ultranet.com/~harwood/
email
: harwood@ma.ultranet.com
Harwood
Engineering Company, Inc.
20,000
psi or Metric Equivalent