Power Section Specification
500-7826 (R)
5" 7:8 Lobes 2.6 Stages
Rotor Specifications
Overall Length 220.00 in
Avg. Diameter 2.748 in
Contour Length 214.00 in
Eccentricity 0.174 in
Major Diameter 3.097 in
Head Diameter 2.750 in
Head Length 6.00 in
Weight 370 lb
Thread Form 2.3/8" HEF
Stator Specifications
Overall Length 229.25 in
Tube OD 5.00 in
Contour Length 213.25 in
Tube ID 4.000 in
Rubber Cut-back
Side 1: 8.00 in
Side 2: 8.00 in
Weight 503 lb
Material Alloy Steel
Performance Specifications
Flow Range 100-300 GPM
Rev per Unit Volume 0.25 Rev/Gal
Speed Range 25-75 RPM
No Load Pressure Loss 112 psi
  POB
Max Rec Press 620 psi
Torque @ Max Press 6,420 ft-lbs
Stall Pressure 920 psi
Stall Torque 9,630 ft-lbs
Stator Minors and Fit (in) at 70°F
  POB
Group Minor Fit
0 2.750 -0.002
3 2.766 -0.018
Reline Lengths (in) Max 229 Min 223 Alternate Stator OD (in): 4.750 / -
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) 0 200 400 600 Speed (RPM) 0
Mechanical Power
Differential Pressure (psi) 0 500 Mechanical Power (hp) 0
Torque
Differential Pressure (psi) 0 100 200 300 400 500 600 700 Torque (ft-lb) 0 2,000 4,000 6,000 8,000
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 200 GPM 300 GPM Differential Pressure (psi) 0 100 200 300 400 500 600 700 Speed (RPM) 0 20 40 60 80
Mechanical Power
100 GPM 200 GPM 300 GPM Differential Pressure (psi) 0 200 400 600 800 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.