We are seeking a hydraulic drilling head with specifications similar to the Dando 1000 PS-HD. The key performance features include:

Hydraulic System: Twin piston motors providing controlled rotation and torque.
Torque and Speed: Max torque as per curve (up to 35, 000 Nm at low RPM).
Flow Rate:
Max flow to each motor: 480 l/min.
Max flow to control valve: 960 l/min.
Pressure:
Max hydraulic pressure: 420 bar.
Mud pressure: 3000 PSI (200 BAR) working (4500 PSI max) (300 BAR)
Features:
Hydraulic piston and motor drive.
Twin worm shaft and single gear wheel arrangement.
Taper roller bearing-mounted hollow spindle (103mm ID).
Build: Robust and suitable for heavy-duty operations (estimated weight: 680kg).

Additional Specifications:

Gear oil: 18 liters, EP Gear Oil Grade 80/90.
Hydraulic oil: Shell Tellus 46 or equivalent.
Maximum pullback: 50 tons.
Additional Requirements:

Can be easily mounted on-board drilling vessels and onshore rigs.
Low maintenance and long service life.
Technical support for compatibility with existing hydraulic systems.

Please include brochures, technical specifications, and video demonstrations. Ensure pricing includes a detailed breakdown of features and optional add-ons. Responses without detailed specifications will not be considered.