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RO-38 ENGINEERING DATA
Power End
Model Triplex Pump RO-38
Maximum Input HP at Speed 30 at 600 rpm
Rated Continuous Plunger Load 2,968 lbs.
Stroke 2"
Maximum Rated Continuous Speed 600 rpm
Normal Continuous Speed Range 350 to 575 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 316 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
84,000+hr
Liquid End
Plunger Size Range, Diameter 1-7/8" thru 7/8"
Maximum Continuous Working Pressure 2,418 psi
Hydrostatic Test 3,750 psi
Discharge Connection Size 1-1/4" NPTF
Suction Connection Size 2" NPTF
Available Liquid End Materials, ASTM:
Nickel Aluminum Bronze
Stainless Steel Block
Stainless Steel Block
B148-C955
2205 Duplex S.S.
316 S.S.
RO-38 ENGINEERING DATA
Liquid End (Continued)
Available Plunger Type Rokide
®
Stainless Steel:
Chromium Oxide-Coated 316 S.S.
Stuffing Boxes, Field-Removable and Replaceable:
Gland, Stuffing Box
Stainless Steel
Nickel Aluminum
Bronze
Packing Types Available:
Spring-loaded, Cup-Type
Spring-loaded, Garlock
Style 120X
Style 8921K
Valve Cover and Cylinder Head Plugs 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
Delrin
®
Stainless Steel
Valve Spring Material Inconel
®
Valve Seat, Liquid Passage Areas 1.4 sq. in.
Average Liquid Velocity thru Valves with 1-7/8" Plungers:
At 600 Crankshaft rpm
At 450 Crankshaft rpm
6.57 fps
4.93 fps
Average Liquid Velocity 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 Stainless Steel Liquid End
430 lbs.
455 lbs.
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