Power Section Specification
800-6740
8" 6:7 Lobes 4.0 Stages
Rotor Specifications
Overall Length 199.00 in
Avg. Diameter 4.285 in
Contour Length 192.00 in
Eccentricity 0.336 in
Major Diameter 4.958 in
Head Diameter 4.750 in
Head Length 7.00 in
Weight 795 lb
Thread Form 3 1/2" API IF
Stator Specifications
Overall Length 206.00 in
Tube OD 8.00 in
Contour Length 190.00 in
Tube ID 6.250 in
Rubber Cut-back
Side 1: 8.00 in
Side 2: 8.00 in
Weight 1240 lb
Material Alloy Steel
Performance Specifications
Flow Range 300-900 GPM
Rev per Unit Volume 0.17 Rev/Gal
Speed Range 51-153 RPM
No Load Pressure Loss 150 psi
  POB XTH PRR
Max Rec Press 920 psi 1,010 psi 920 psi
Torque @ Max Press 14,320 ft-lbs 15,750 ft-lbs 14,320 ft-lbs
Stall Pressure 1,370 psi 1,510 psi 1,370 psi
Stall Torque 21,470 ft-lbs 23,620 ft-lbs 21,470 ft-lbs
Stator Minors and Fit (in) at 70°F
  PRR POB XTH
Group Minor Fit Minor Fit Minor Fit
T 4.258 0.027 4.258 0.027 4.258 0.027
0 4.286 -0.000 4.285 0.000 4.285 0.000
4 4.312 -0.027 4.317 -0.032 4.317 -0.032
7 4.351 -0.066 4.351 -0.066
Reline Lengths (in) Max 206 Min 200 Alternate Stator OD (in): 7.750 / -
Torque
Differential Pressure (psi) 0 500 1,000 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 Speed (RPM) 0
Mechanical Power
Differential Pressure (psi) 0 1,000 Mechanical Power (hp) 0
Torque
Differential Pressure (psi) 0 200 400 600 800 1,000 1,200 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 0.05 0.1 0.15
Speed
300 GPM 600 GPM 900 GPM Differential Pressure (psi) 0 200 400 600 800 1,000 1,200 Speed (RPM) 0 50 100 150 200
Mechanical Power
300 GPM 600 GPM 900 GPM Differential Pressure (psi) 0 200 400 600 800 1,000 1,200 1,400 1,600 Mechanical Power (hp) 0 100 200 300 400 500
©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.