ERT™ Power Section Specification (Metric)
512ERT5695
130.18 mm 5:6 Lobes 9.5 Stages
Rotor Specifications
Overall Length 6413.5 mm
Avg. Diameter 71.21 mm
Contour Length 6223.0 mm
Eccentricity 5.90 mm
Major Diameter 83.01 mm
Head Diameter 78.74 mm
Head Length 190.5 mm
Weight 207 kg
Thread Form 2.438" XDV
Stator Specifications
Overall Length 6604.0 mm
Tube OD 130.17 mm
Contour Length 6172.2 mm
Tube ID 107.95 mm
Rubber Cut-back
Side 1: 215.9 mm
Side 2: 215.9 mm
Weight 306 kg
Material Alloy Steel
Performance Specifications
Flow Range 1136-1609 LPM
Rev per Unit Volume 0.21 Rev/L
Speed Range 240-340 RPM
No Load Pressure Loss 1269 kPa
  POB XTH
Max Rec Press 16,850 kPa 18,050 kPa
Torque @ Max Press 11,420 N-m 12,240 N-m
Stall Pressure 30,840 kPa 33,040 kPa
Stall Torque 20,900 N-m 22,390 N-m
Stator Minors and Fit (mm) at 21°C
  XTH POB
Group Minor Fit Minor Fit
0 71.22 -0.01
2 71.45 -0.24 71.40 -0.19
6 71.65 -0.44 71.65 -0.44
 
Reline Lengths (mm) Max 6604 Min 6452
Alt. Stator OD (mm)   -   -
Alt. Rotor Diameter (mm) - - - -

Max DP for reliable operation will vary based on
operational conditions. Refer to ERT Operational
Guidelines for guidance.

Torque
Differential Pressure (kPa) 0 20,000 Torque (Nm) 0
Fit Increase
Change in Temperature (°C) 0 50 100 150 Fit Increase (mm) 0
Speed
Differential Pressure (kPa) 0 20,000 Speed (RPM) 0
Mechanical Power
Differential Pressure (kPa) 0 20,000 Mechanical Power (Kw) 0
Torque
Differential Pressure (kPa) 0 5,000 10,000 15,000 20,000 25,000 Torque (Nm) 0 5,000 10,000 15,000
Fit Increase
Change in Temperature (°C) 0 20 40 60 80 100 120 140 160 180 Fit Increase (mm) 0 0.2 0.4 0.6 0.8
Speed
1136 LPM 1372 LPM 1609 LPM Differential Pressure (kPa) 0 5,000 10,000 15,000 20,000 25,000 Speed (RPM) 0 100 200 300 400
Mechanical Power
1136 LPM 1372 LPM 1609 LPM Differential Pressure (kPa) 0 5,000 10,000 15,000 20,000 25,000 30,000 Mechanical Power (Kw) 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.