Power Section Specification (Metric)
287-7836
73 mm 7:8 Lobes 3.6 Stages
Rotor Specifications
Overall Length 1879.6 mm
Avg. Diameter 42.04 mm
Contour Length 1727.2 mm
Eccentricity 2.64 mm
Major Diameter 47.32 mm
Head Diameter 41.27 mm
Head Length 152.4 mm
Weight 21 kg
Thread Form 1 1/8"-5 SA
Stator Specifications
Overall Length 1905.0 mm
Tube OD 73.02 mm
Contour Length 1701.8 mm
Tube ID 60.32 mm
Rubber Cut-back
Side 1: 101.6 mm
Side 2: 101.6 mm
Weight 22 kg
Material Alloy Steel
Performance Specifications
Flow Range 189-454 LPM
Rev per Unit Volume 0.77 Rev/L
Speed Range 145-350 RPM
No Load Pressure Loss 696 kPa
  XTH RTP
Max Rec Press 6,470 kPa 5,880 kPa
Torque @ Max Press 1,150 N-m 1,040 N-m
Stall Pressure 9,710 kPa 8,820 kPa
Stall Torque 1,720 N-m 1,570 N-m
Stator Minors and Fit (mm) at 21°C
  RTP XTH
Group Minor Fit Minor Fit
0 42.14 -0.10 42.14 -0.10
Reline Lengths (mm) Max 1905 Min 1753 Alternate Stator OD (mm): - / -
Torque
Differential Pressure (kPa) 0 5,000 Torque (Nm) 0
Fit Increase
Change in Temperature (°C) 0 100 200 Fit Increase (mm) 0
Speed
Differential Pressure (kPa) 0 5,000 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 Torque (Nm) 0 500 1,000 1,500 2,000
Fit Increase
Change in Temperature (°C) 0 50 100 150 200 Fit Increase (mm) 0 0.5 1 1.5
Speed
189 LPM 322 LPM 454 LPM Differential Pressure (kPa) 0 1,000 2,000 3,000 4,000 5,000 6,000 7,000 8,000 Speed (RPM) 0 100 200 300 400
Mechanical Power
189 LPM 322 LPM 454 LPM Differential Pressure (kPa) 0 2,000 4,000 6,000 8,000 10,000 Mechanical Power (Kw) 0 10 20 30 40
©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.