ERT™ Power Section Specification
962ERT6735
9.625" 6:7 Lobes 3.5 Stages
Rotor Specifications
Overall Length 197.50 in
Avg. Diameter 5.372 in
Contour Length 189.50 in
Eccentricity 0.412 in
Major Diameter 6.196 in
Head Diameter 5.900 in
Head Length 8.00 in
Weight 1200 lb
Thread Form 4" API FH
Stator Specifications
Overall Length 210.00 in
Tube OD 9.62 in
Contour Length 183.00 in
Tube ID 6.210 in
Rubber Cut-back
Side 1: 14.00 in
Side 2: 14.00 in
Weight 1950 lb
Material Alloy Steel
Performance Specifications
Flow Range 600-1200 GPM
Rev per Unit Volume 0.10 Rev/Gal
Speed Range 61-122 RPM
No Load Pressure Loss 209 psi
  POB XTH
Max Rec Press 930 psi 1,000 psi
Torque @ Max Press 24,590 ft-lbs 26,350 ft-lbs
Stall Pressure 1,710 psi 1,830 psi
Stall Torque 45,000 ft-lbs 48,220 ft-lbs
Stator Minors and Fit (in) at 70°F
  XTH POB
Group Minor Fit Minor Fit
0 5.357 0.015 5.357 0.015
4 5.371 0.001 5.371 0.001
5 5.394 -0.022 5.394 -0.022
 
Reline Lengths (in) Max 210 Min 204
Alt. Stator OD (in)   11.250   -
Alt. Rotor Diameter (in) - 5.357 - 5.339

Max DP for reliable operation will vary based on
operational conditions. Refer to ERT Operational
Guidelines for guidance.

Torque
Differential Pressure (psi) 0 500 1,000 1,500 Torque (ft-lb) 0
Fit Increase
Change in Temperature (°F) 0 100 200 300 Fit Increase (in) 0
Speed
Differential Pressure (psi) 0 500 1,000 1,500 Speed (RPM) 0
Mechanical Power
Differential Pressure (psi) 0 1,000 Mechanical Power (hp) 0
Torque
Differential Pressure (psi) 0 500 1,000 1,500 Torque (ft-lb) 0 10,000 20,000 30,000 40,000
Fit Increase
Change in Temperature (°F) 0 50 100 150 200 250 300 Fit Increase (in) 0 0.02 0.04 0.06
Speed
600 GPM 900 GPM 1200 GPM Differential Pressure (psi) 0 200 400 600 800 1,000 1,200 1,400 Speed (RPM) 0 50 100
Mechanical Power
600 GPM 900 GPM 1200 GPM Differential Pressure (psi) 0 500 1,000 1,500 Mechanical Power (hp) 0 200 400 600
©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.