Power Section Specification
700-8921
7" 8:9 Lobes 2.1 Stages
Rotor Specifications
Overall Length 251.50 in
Avg. Diameter 4.300 in
Contour Length 244.50 in
Eccentricity 0.215 in
Major Diameter 4.731 in
Head Diameter 4.000 in
Head Length 7.00 in
Weight 859 lb
Thread Form 2 7/8" API Reg
Stator Specifications
Overall Length 260.00 in
Tube OD 7.00 in
Contour Length 244.00 in
Tube ID 5.750 in
Rubber Cut-back
Side 1: 8.00 in
Side 2: 8.00 in
Weight 1037 lb
Material Alloy Steel
Performance Specifications
Flow Range 300-650 GPM
Rev per Unit Volume 0.09 Rev/Gal
Speed Range 26-57 RPM
No Load Pressure Loss 180 psi
  POB
Max Rec Press 520 psi
Torque @ Max Press 15,090 ft-lbs
Stall Pressure 770 psi
Stall Torque 22,630 ft-lbs
Stator Minors and Fit (in) at 70°F
  POB
Group Minor Fit
1 4.309 -0.009
Reline Lengths (in) Max 260 Min 254 Alternate Stator OD (in): - / -
Torque
Differential Pressure (psi) 0 200 400 600 Torque (ft-lb) 0
Fit Increase
Change in Temperature (°F) 0 100 200 300 Fit Increase (in) 0
Speed
Differential Pressure (psi) 0 200 400 600 Speed (RPM) 0
Mechanical Power
Differential Pressure (psi) 0 500 Mechanical Power (hp) 0
Torque
Differential Pressure (psi) 0 100 200 300 400 500 600 Torque (ft-lb) 0 5,000 10,000 15,000
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 0.1
Speed
300 GPM 475 GPM 650 GPM Differential Pressure (psi) 0 100 200 300 400 500 600 Speed (RPM) 0 20 40 60
Mechanical Power
300 GPM 475 GPM 650 GPM Differential Pressure (psi) 0 100 200 300 400 500 600 700 800 Mechanical Power (hp) 0 50 100 150
©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.