Power Section Specification
287-7836
2.875" 7:8 Lobes 3.6 Stages
Rotor Specifications
Overall Length 74.00 in
Avg. Diameter 1.655 in
Contour Length 68.00 in
Eccentricity 0.104 in
Major Diameter 1.863 in
Head Diameter 1.625 in
Head Length 6.00 in
Weight 46 lb
Thread Form 1 1/8"-5 SA
Stator Specifications
Overall Length 75.00 in
Tube OD 2.88 in
Contour Length 67.00 in
Tube ID 2.375 in
Rubber Cut-back
Side 1: 4.00 in
Side 2: 4.00 in
Weight 48 lb
Material Alloy Steel
Performance Specifications
Flow Range 50-120 GPM
Rev per Unit Volume 2.92 Rev/Gal
Speed Range 145-350 RPM
No Load Pressure Loss 101 psi
  XTH RTP
Max Rec Press 940 psi 850 psi
Torque @ Max Press 850 ft-lbs 770 ft-lbs
Stall Pressure 1,410 psi 1,280 psi
Stall Torque 1,270 ft-lbs 1,160 ft-lbs
Stator Minors and Fit (in) at 70°F
  RTP XTH
Group Minor Fit Minor Fit
0 1.659 -0.004 1.659 -0.004
Reline Lengths (in) Max 75 Min 69 Alternate Stator OD (in): - / -
Torque
Differential Pressure (psi) 0 500 1,000 Torque (ft-lb) 0 1,000
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 0.01 0.02 0.03 0.04 0.05
Speed
50 GPM 85 GPM 120 GPM Differential Pressure (psi) 0 200 400 600 800 1,000 Speed (RPM) 0 100 200 300 400
Mechanical Power
50 GPM 85 GPM 120 GPM Differential Pressure (psi) 0 200 400 600 800 1,000 1,200 Mechanical Power (hp) 0 20 40 60
©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.