Power Section Specification
338-7825
3.375" 7:8 Lobes 2.5 Stages
Rotor Specifications
Overall Length 96.00 in
Avg. Diameter 1.876 in
Contour Length 88.00 in
Eccentricity 0.122 in
Major Diameter 2.120 in
Head Diameter 2.250 in
Head Length 8.00 in
Weight 77 lb
Thread Form 0.75-10 UNC
Stator Specifications
Overall Length 99.88 in
Tube OD 3.38 in
Contour Length 85.88 in
Tube ID 2.625 in
Rubber Cut-back
Side 1: 7.00 in
Side 2: 7.00 in
Weight 107 lb
Material Alloy Steel
Performance Specifications
Flow Range 80-210 GPM
Rev per Unit Volume 1.23 Rev/Gal
Speed Range 98-258 RPM
No Load Pressure Loss 159 psi
  XTH RTP
Max Rec Press 650 psi 590 psi
Torque @ Max Press 1,400 ft-lbs 1,270 ft-lbs
Stall Pressure 980 psi 890 psi
Stall Torque 2,100 ft-lbs 1,910 ft-lbs
Stator Minors and Fit (in) at 70°F
  RTP XTH
Group Minor Fit Minor Fit
0 1.880 -0.004 1.880 -0.004
4 1.893 -0.017 1.893 -0.017
Reline Lengths (in) Max 100 Min 94 Alternate Stator OD (in): - / -
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) 0 500 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) 0 500 1,000 1,500 2,000
Fit Increase
Change in Temperature (°F) 0 50 100 150 200 250 300 350 Fit Increase (in) 0 0.01 0.02 0.03 0.04 0.05
Speed
80 GPM 145 GPM 210 GPM Differential Pressure (psi) 0 100 200 300 400 500 600 700 Speed (RPM) 0 100 200 300
Mechanical Power
80 GPM 145 GPM 210 GPM Differential Pressure (psi) 0 100 200 300 400 500 600 700 800 900 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.