Power Section Specification
287-4540
2.875" 4:5 Lobes 4.0 Stages
Rotor Specifications
Overall Length 101.93 in
Avg. Diameter 1.531 in
Contour Length 97.93 in
Eccentricity 0.156 in
Major Diameter 1.843 in
Head Diameter 1.690 in
Head Length 4.00 in
Weight 75 lb
Thread Form 1.150-8 SPEC ACME HT
Stator Specifications
Overall Length 105.63 in
Tube OD 2.88 in
Contour Length 97.63 in
Tube ID 2.375 in
Rubber Cut-back
Side 1: 4.00 in
Side 2: 4.00 in
Weight 69 lb
Material Alloy Steel
Performance Specifications
Flow Range 70-210 GPM
Rev per Unit Volume 2.89 Rev/Gal
Speed Range 202-606 RPM
No Load Pressure Loss 132 psi
  XTH RTP
Max Rec Press 930 psi 850 psi
Torque @ Max Press 910 ft-lbs 830 ft-lbs
Stall Pressure 1,400 psi 1,270 psi
Stall Torque 1,370 ft-lbs 1,240 ft-lbs
Stator Minors and Fit (in) at 70°F
  RTP XTH
Group Minor Fit Minor Fit
0 1.533 -0.002
2 1.539 -0.008
5 1.554 -0.023 1.554 -0.023
Reline Lengths (in) Max 106 Min 100 Alternate Stator OD (in): - / -
Torque
Differential Pressure (psi) 0 500 1,000 Torque (ft-lb) 0
Fit Increase
Change in Temperature (°F) 0 100 200 300 Fit Increase (in) 0
Speed
Differential Pressure (psi) 0 500 1,000 Speed (RPM) 0
Mechanical Power
Differential Pressure (psi) 0 500 1,000 Mechanical Power (hp) 0
Torque
Differential Pressure (psi) 0 200 400 600 800 1,000 Torque (ft-lb) 0 200 400 600 800 1,000
Fit Increase
Change in Temperature (°F) 0 50 100 150 200 250 300 350 Fit Increase (in) 0 0.02 0.04 0.06 0.08
Speed
70 GPM 140 GPM 210 GPM Differential Pressure (psi) 0 200 400 600 800 1,000 Speed (RPM) 0 200 400 600 800
Mechanical Power
70 GPM 140 GPM 210 GPM Differential Pressure (psi) 0 200 400 600 800 1,000 1,200 Mechanical Power (hp) 0 50 100
©2026 NOV. All rights reserved. Except as noted, all trademarks referenced in this document are trademarks of NOV. Performance curves describe theoretical performance with 175°F (79°C) water and are for reference only. Operational fit and drilling conditions will affect performance. Operation above maximum recommended limits will reduce life. Specification data are subject to change without notice.
PS App v.