Power Section Specification (Metric)
800-7840
203.2 mm 7:8 Lobes 4.0 Stages
Rotor Specifications
Overall Length 4991.1 mm
Avg. Diameter 117.07 mm
Contour Length 4813.3 mm
Eccentricity 7.32 mm
Major Diameter 131.72 mm
Head Diameter 120.65 mm
Head Length 177.8 mm
Weight 425 kg
Thread Form 3 1/2" API IF / Reg
Stator Specifications
Overall Length 5232.4 mm
Tube OD 203.20 mm
Contour Length 4826.0 mm
Tube ID 158.75 mm
Rubber Cut-back
Side 1: 203.2 mm
Side 2: 203.2 mm
Weight 552 kg
Material Alloy Steel
Performance Specifications
Flow Range 1136-3785 LPM
Rev per Unit Volume 0.04 Rev/L
Speed Range 48-160 RPM
No Load Pressure Loss 1131 kPa
  POB XTH PRR
Max Rec Press 6,540 kPa 7,190 kPa 6,540 kPa
Torque @ Max Press 21,170 N-m 23,280 N-m 21,170 N-m
Stall Pressure 9,800 kPa 10,780 kPa 9,800 kPa
Stall Torque 31,750 N-m 34,920 N-m 31,750 N-m
Stator Minors and Fit (mm) at 21°C
  PRR POB XTH
Group Minor Fit Minor Fit Minor Fit
0 116.38 0.69 116.38 0.69 116.38 0.69
1 116.87 0.21 116.87 0.21
2 117.17 -0.10 117.09 -0.02 117.09 -0.02
4 117.68 -0.60 117.70 -0.63 117.70 -0.63
Reline Lengths (mm) Max 5232 Min 5080 Alternate Stator OD (mm): - / -
Torque
Differential Pressure (kPa) 0 5,000 10,000 Torque (Nm) 0
Fit Increase
Change in Temperature (°C) 0 100 200 Fit Increase (mm) 0
Speed
Differential Pressure (kPa) 0 5,000 10,000 Speed (RPM) 0
Mechanical Power
Differential Pressure (kPa) 0 5,000 10,000 Mechanical Power (Kw) 0
Torque
Differential Pressure (kPa) 0 2,000 4,000 6,000 8,000 10,000 Torque (Nm) 0 10,000 20,000
Fit Increase
Change in Temperature (°C) 0 50 100 150 200 Fit Increase (mm) 0 1 2 3
Speed
1136 LPM 2461 LPM 3785 LPM Differential Pressure (kPa) 0 2,000 4,000 6,000 8,000 10,000 Speed (RPM) 0 50 100 150 200
Mechanical Power
1136 LPM 2461 LPM 3785 LPM Differential Pressure (kPa) 0 5,000 10,000 Mechanical Power (Kw) 0 100 200 300 400
©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.