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MA-25M ENGINEERING DATA
Power End
Model Triplex Pump MA-25M
Maximum Input HP at Speed 25 at 600 rpm
Rated Continuous Plunger Load 2,475 lbs.
Stroke 2"
Maximum Rated Continuous Speed 600 rpm
Normal Continuous Speed Range 150 to 500 rpm
Minimum Speed 100 rpm
Oil Capacity 5 U.S. Quarts
Viscosity, S.S.U. at 210ºF 70 to 84
Power End Oiling System Splash & Scoop
Power Frame, One Piece Cast Iron
Crosshead, Full Cylindrical Cast Iron
Crosshead, Diameter x Length 3-1/4" x 3-5/8"
Crankshaft Ductile Iron
Crankshaft Diameters:
At Drive Extension
At Tapered Roller Bearings
At Crankpin Bearings, Diameter x Length
2.125/2.124"
3.15"
2.250" x 1.625"
Crosshead (Wrist) Pin, Case-Hardened and Ground AISI 8620
Main Bearings, Tapered Roller Timken
Crankpin Bearings, Precision Automotive Babbitt-Lined
Extension (Pony) Rod:
Integral with Plungers, 1-7/8" thru 1-1/8"
Separate with Plungers, 1" thru 3/4"
316 S.S.
416 S.S.
Connecting Rod, Automotive Type Ductile Iron
Average Crosshead Speed:
At 600 rpm
At 450 rpm
200 fpm
150 fpm
Minimum Life Expectancy, Main Bearings, L
10
50,000+hr
Liquid End
Plunger Size Range, Diameter 1-7/8" thru 3/4"
Maximum Continuous Working Pressure 3,500 psi
Hydrostatic Test 5,250 psi
Discharge Connection Size 1-1/4" NPTF
Suction Connection Size 2" NPTF
Available Liquid End Materials, ASTM:
Nickel Aluminum Bronze
Carbon Steel Block
Ductile Iron
Stainless Steel Block
B148-C955
A516 Grade 70
A536 80-55-06
Various Grades
MA-25M ENGINEERING DATA
Liquid End (Continued)
Plunger Type Rokide
®
Stainless Steel:
Chromium Oxide-Coated 316 S.S.
Stuffing Boxes, Field-Removable and Replaceable:
Stainless Steel, Hardened
Carbon Steel
17-4PH
1020
Packing Types Available:
Gland-loaded, Nonadjustable
Spring-loaded, Cup-Type
Spring-loaded, Braided Teflon
®
& Kevlar
®
Spring-loaded, Garlock
Style 838
Style 120X
Style 140/141
Style 8921K
Valve Cover and
Cylinder Head Plugs
416 S.S. or
316 S.S.
Retainer Plates, Steel, ASTM A36
Seals, Stuffing Boxes, Valve Covers, Cylinder Heads Buna-N
Bolting, High Strength, Heat Treated Alloy Steel
Available Valve Types:
Standard, Acetal Resin
Optional, Hardened and Lapped
Double Stem-Guided
Delrin
®
17-4PH S.S.
17-4PH S.S.
Valve Seat, Liquid Passage Areas
Plate (Disc) Valves, (Delrin
®
or S.S.)
Double Stem-Guided Valve
1.400 sq. in.
.96 sq. in.
Average Liquid Velocity with 1-7/8" Plungers,
Plate Valves:
At 600 Crankshaft rpm
At 450 Crankshaft rpm
6.57 fps
4.93 fps
Average Liquid Velocity with 1-7/8" Plungers,
Stem-Guided Valves:
At 600 Crankshaft rpm
At 450 Crankshaft rpm
9.61 fps
7.21 fps
Average Liquid Velocity 1-7/8" Plungers at 600 rpm:
Suction Manifold
Discharge Manifold
4.12 fps
10.75 fps
General
Overall Dimensions:
Length
Width
Height
31-3/4"
20-3/8"
12-3/8"
Approximate Weights:
With Nickel Aluminum Bronze Liquid End
With Ductile Iron Liquid End
With Stainless Steel Liquid End
430 lbs.
420 lbs.
455 lbs.
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