Power Section Specification
312-5650
3.125" 5:6 Lobes 5.0 Stages
Rotor Specifications
Overall Length 101.50 in
Avg. Diameter 1.777 in
Contour Length 97.00 in
Eccentricity 0.148 in
Major Diameter 2.073 in
Head Diameter 1.850 in
Head Length 4.50 in
Weight 72 lb
Thread Form 1.275-5 NOIHT
Stator Specifications
Overall Length 106.00 in
Tube OD 3.12 in
Contour Length 94.75 in
Tube ID 2.625 in
Rubber Cut-back
Side 1: 5.62 in
Side 2: 5.62 in
Weight 76 lb
Material Alloy Steel
Performance Specifications
Flow Range 80-210 GPM
Rev per Unit Volume 2.64 Rev/Gal
Speed Range 211-555 RPM
No Load Pressure Loss 129 psi
  XTH RTP
Max Rec Press 1,210 psi 1,100 psi
Torque @ Max Press 1,260 ft-lbs 1,150 ft-lbs
Stall Pressure 1,820 psi 1,650 psi
Stall Torque 1,900 ft-lbs 1,720 ft-lbs
Stator Minors and Fit (in) at 70°F
  RTP XTH
Group Minor Fit Minor Fit
0 1.783 -0.006 1.783 -0.006
3 1.795 -0.018 1.795 -0.018
Reline Lengths (in) Max 106 Min 100 Alternate Stator OD (in): - / -
Torque
Differential Pressure (psi) 0 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 1,500 Speed (RPM) 0
Mechanical Power
Differential Pressure (psi) 0 1,000 Mechanical Power (hp) 0
Torque
Differential Pressure (psi) 0 200 400 600 800 1,000 1,200 1,400 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 0.02 0.04 0.06
Speed
80 GPM 145 GPM 210 GPM Differential Pressure (psi) 0 200 400 600 800 1,000 1,200 1,400 Speed (RPM) 0 200 400 600
Mechanical Power
80 GPM 145 GPM 210 GPM Differential Pressure (psi) 0 500 1,000 1,500 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.