ERT™ Power Section Specification (Metric)
675ERTcr7829
171.5 mm 7:8 Lobes 2.9 Stages
Rotor Specifications
Overall Length 5422.9 mm
Avg. Diameter 96.72 mm
Contour Length 5245.1 mm
Eccentricity 6.20 mm
Major Diameter 109.12 mm
Head Diameter 101.60 mm
Head Length 177.8 mm
Weight 289 kg
Thread Form 2 7/8" API Reg
Stator Specifications
Overall Length 5588.0 mm
Tube OD 171.45 mm
Contour Length 5181.6 mm
Tube ID 115.01 mm
Rubber Cut-back
Side 1: 203.2 mm
Side 2: 203.2 mm
Weight 372 kg
Material Alloy Steel
Performance Specifications
Flow Range 1136-2461 LPM
Rev per Unit Volume 0.04 Rev/L
Speed Range 47-102 RPM
No Load Pressure Loss 1593 kPa
  POB XTH
Max Rec Press 5,530 kPa 5,920 kPa
Torque @ Max Press 18,250 N-m 19,560 N-m
Stall Pressure 10,120 kPa 10,840 kPa
Stall Torque 33,400 N-m 35,790 N-m
Stator Minors and Fit (mm) at 21°C
  XTH POB
Group Minor Fit Minor Fit
0 96.82 -0.10 96.82 -0.10
2 97.21 -0.48 97.21 -0.48
5 97.26 -0.53 97.26 -0.53
7 97.51 -0.79 97.51 -0.79
 
Reline Lengths (mm) Max 5588 Min 5436
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 5,000 10,000 Torque (Nm) 0
Fit Increase
Change in Temperature (°C) 0 50 100 150 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 30,000
Fit Increase
Change in Temperature (°C) 0 20 40 60 80 100 120 140 160 180 Fit Increase (mm) 0 0.5 1
Speed
1136 LPM 1798 LPM 2461 LPM Differential Pressure (kPa) 0 2,000 4,000 6,000 8,000 10,000 Speed (RPM) 0 50 100
Mechanical Power
1136 LPM 1798 LPM 2461 LPM Differential Pressure (kPa) 0 2,000 4,000 6,000 8,000 10,000 12,000 Mechanical Power (Kw) 0 100 200 300
©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.