Power Section Specification
800-7859
8" 7:8 Lobes 5.9 Stages
Rotor Specifications
Overall Length 293.00 in
Avg. Diameter 4.609 in
Contour Length 284.00 in
Eccentricity 0.288 in
Major Diameter 5.186 in
Head Diameter 5.500 in
Head Length 9.00 in
Weight 1389 lb
Thread Form 3.500 NOIHT
Stator Specifications
Overall Length 300.00 in
Tube OD 8.00 in
Contour Length 281.00 in
Tube ID 6.250 in
Rubber Cut-back
Side 1: 8.00 in
Side 2: 11.00 in
Weight 1778 lb
Material Alloy Steel
Performance Specifications
Flow Range 400-1000 GPM
Rev per Unit Volume 0.15 Rev/Gal
Speed Range 61-154 RPM
No Load Pressure Loss 168 psi
  XTH
Max Rec Press 1,520 psi
Torque @ Max Press 24,010 ft-lbs
Stall Pressure 2,290 psi
Stall Torque 39,160 ft-lbs
Stator Minors and Fit (in) at 70°F
  XTH
Group Minor Fit
0 4.594 0.015
Reline Lengths (in) Max 300 Min 294 Alternate Stator OD (in): - / -
Torque
Differential Pressure (psi) 0 1,000 2,000 Torque (ft-lb) 0
Fit Increase
Change in Temperature (°F) 0 100 200 300 Fit Increase (in) 0
Speed
Differential Pressure (psi) 0 1,000 2,000 Speed (RPM) 0
Mechanical Power
Differential Pressure (psi) 0 1,000 2,000 Mechanical Power (hp) 0
Torque
Differential Pressure (psi) 0 500 1,000 1,500 2,000 Torque (ft-lb) 0 10,000 20,000 30,000 40,000
Fit Increase
Change in Temperature (°F) 0 50 100 150 200 250 300 350 Fit Increase (in) 0 0.02 0.04 0.06 0.08 0.1
Speed
400 GPM 700 GPM 1000 GPM Differential Pressure (psi) 0 500 1,000 1,500 2,000 Speed (RPM) 0 50 100 150 200
Mechanical Power
400 GPM 700 GPM 1000 GPM Differential Pressure (psi) 0 500 1,000 1,500 2,000 Mechanical Power (hp) 0 200 400 600 800
©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.