Appendix A—Model Number and Identification Code for Strainer and
Air Operated Valve (AOV)
Operating Specifications
Appendix B—Technical Specifications for the PT-Series
Pump Model
Strainer Assembly Part
Number
PT/PTH20 4684-X
PT/PTH25 4689-X
PT/PTH30 4680-X
Strainer Assembly
1
1
Strainer assembly ordered by part number when not assembled to the pump.
2
Viton
®
is a registered trademark of the DuPont company.
Standard connections: 2 in., 2-1/2 in., and 3 in. NPT
Optional connections: BSPT, Slip-on weld
Maximum differential pressure: 125 psid (8.6 bar)
Temperature range: -25° to 300°F (-32° to 149°C)
Maximum working pressure: 200 psi (13.8 bar)
Maximum speed: 780 RPM—all models 20 and 25
640 RPM—all models 30
Maximum flow: Up to 271 GPM (1,026 L/min)
Maximum viscosity: 20,000 SSU (4,250 cP)
Fluids: Refined petroleum products, industrial
solvents, and other fluids
Part Standard Material Available Options
Case Cast iron ASTM A48
Head Cast iron ASTM A48
Flanges Cast iron ASTM A48
Rotor Ductile iron ASTM A536
Bearing cap Steel Bearing cover / spacer with hydraulic motor
adapter (cast aluminum) and coupling (steel)
Bearings Ball (single row), grease lubricated to 300°F (149°C) Max.
Vanes Full size with 316 stainless steel wear plate to 240°F
(115°C); 20,000 SSU (4,250 cP) max.
Bypass valve Cast iron ASTM A48 electroless nickel plated
Bypass/AOV cap Cast iron ASTM A48
Bypass valve cover Cast iron ASTM A48
Bypass valve spring Plated steel
Bypass valve spring
ranges
35–125 psi (2.4–8.6 bar)
Seal seat Cast iron
Seal metal parts Steel
Shaft Double end keyed shaft, high strength steel
O-rings Viton®
2
to 300°F (149°C) Buna-N to 240°F (115°C)
Gaskets Composition to 500°F (260°C)
Vane drivers Case hardened steel
Gage ports 1/4 in. NPT
Pump Model AOV Part Number
PT/PTH20 5470-1XA (Buna-N)
PT/PTH25 5462-1XA (Buna-N)
PT/PTH30 5566-XA (Buna-N)
Air Operated Valve Assembly (AOV)
Material Specifications
15
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