Power Section Specification
475-7822
4.75" 7:8 Lobes 2.2 Stages
Rotor Specifications
Overall Length 107.00 in
Avg. Diameter 2.607 in
Contour Length 101.00 in
Eccentricity 0.164 in
Major Diameter 2.936 in
Head Diameter 2.750 in
Head Length 6.00 in
Weight 168 lb
Thread Form 2 3/8" HEF
Stator Specifications
Overall Length 116.00 in
Tube OD 4.75 in
Contour Length 100.00 in
Tube ID 3.750 in
Rubber Cut-back
Side 1: 8.00 in
Side 2: 8.00 in
Weight 237 lb
Material Alloy Steel
Performance Specifications
Flow Range 100-275 GPM
Rev per Unit Volume 0.50 Rev/Gal
Speed Range 49-136 RPM
No Load Pressure Loss 113 psi
  POB PRR
Max Rec Press 520 psi 520 psi
Torque @ Max Press 2,780 ft-lbs 2,780 ft-lbs
Stall Pressure 780 psi 780 psi
Stall Torque 4,170 ft-lbs 4,170 ft-lbs
Stator Minors and Fit (in) at 70°F
  PRR POB
Group Minor Fit Minor Fit
0 2.605 0.002 2.607 0.000
7 2.650 -0.043 2.649 -0.042
Reline Lengths (in) Max 116 Min 110 Alternate Stator OD (in): 5.000 / -
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 1,000 2,000 3,000
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
Speed
100 GPM 188 GPM 275 GPM Differential Pressure (psi) 0 100 200 300 400 500 600 Speed (RPM) 0 50 100 150
Mechanical Power
100 GPM 188 GPM 275 GPM Differential Pressure (psi) 0 100 200 300 400 500 600 700 800 Mechanical Power (hp) 0 20 40 60 80
©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.