Power Section Specification
312-5635
3.125" 5:6 Lobes 3.5 Stages
Rotor Specifications
Overall Length 84.00 in
Avg. Diameter 1.868 in
Contour Length 81.00 in
Eccentricity 0.156 in
Major Diameter 2.180 in
Head Diameter 2.250 in
Head Length 3.00 in
Weight 62 lb
Thread Form -
Stator Specifications
Overall Length 88.00 in
Tube OD 3.12 in
Contour Length 80.00 in
Tube ID 2.625 in
Rubber Cut-back
Side 1: 4.00 in
Side 2: 4.00 in
Weight 63 lb
Material Alloy Steel
Performance Specifications
Flow Range 100-230 GPM
Rev per Unit Volume 2.15 Rev/Gal
Speed Range 215-494 RPM
No Load Pressure Loss 135 psi
  XTH RTP
Max Rec Press 850 psi 770 psi
Torque @ Max Press 1,090 ft-lbs 990 ft-lbs
Stall Pressure 1,270 psi 1,160 psi
Stall Torque 1,630 ft-lbs 1,480 ft-lbs
Stator Minors and Fit (in) at 70°F
  RTP XTH
Group Minor Fit Minor Fit
0 1.877 -0.009 1.877 -0.009
3 1.891 -0.023 1.891 -0.023
6 1.902 -0.034 1.902 -0.034
Reline Lengths (in) Max 88 Min 82 Alternate Stator OD (in): - / -
Torque
Differential Pressure (psi) 0 500 Torque (ft-lb) 0
Fit Increase
Change in Temperature (°F) 0 100 200 300 Fit Increase (in) 0
Speed
Differential Pressure (psi) 0 500 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 Torque (ft-lb) 0 500 1,000 1,500 2,000
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
100 GPM 165 GPM 230 GPM Differential Pressure (psi) 0 100 200 300 400 500 600 700 800 900 Speed (RPM) 0 100 200 300 400 500
Mechanical Power
100 GPM 165 GPM 230 GPM Differential Pressure (psi) 0 200 400 600 800 1,000 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.