Hydraulic MRL Service Unit MRL

Product catalog summary

Overview: The MRL-H is a hydraulic service unit designed for machine roomless (MRL) elevators, facilitating remote servicing and rescue operations without the need to access the elevator pit. It includes various functional valves and components integrated into a compact body, allowing for easy external access.

Specifications:

Location: Can be placed up to 6 meters away and 5 meters high from the main power unit.
Ports: Return port ¼", Suction port ¼", Output port ½" BSP, Pressure switch port ¼" BSP.
Pressure Range: 0-100 bar (0-1450 psi).
Oil Viscosity: 25-60 cSt at 40°C (15-35 cSt at 120°F).
Max Suction Height: 5 meters with PVC-pipe inside-Ø6 mm; check valve recommended for pipe lengths over 1 meter.

Components and Functions:

Main Shut-off Valve: Keeps the pressure line closed during non-service times.
Slack Rope Valve: Prevents the ram from lowering when the manual lowering valve is opened below ram pressure/weight.
Manual Lowering Valve: Allows manual descent of the elevator car.
Manual Lowering Speed Adjustment: Enables speed adjustment for manual lowering away from the main power unit.
Pressure Relief Valve: Default setting at 100 bar, adjustable.
Hand Pump: Used to raise the elevator car during servicing.
Air Bleed: Releases trapped air to facilitate raising the lift.

Installation and Operation:

Connections: Output port connects to the cylinder line; oil suction and return ports connect to the main tank using polyamide pipes with a minimum inside diameter of 6 mm and outside diameter of 8 mm.
To Lower the Lift: Open the main shut-off valve and turn the manual lowering valve anticlockwise. Adjust the speed if necessary.
To Raise the Lift: Open the main shut-off valve, release trapped air by opening the air-bleed, and pump oil until it appears at the bleed screw. Tighten the screw and continue pumping.

Additional Options: Check valve and PVC-pipe set (2x6m) available upon request.

Catalog excerpts

Hydraulic MRL Service Unit EN ISO 9001 The MRL-H has been designed for servicing and rescuing operations of machine roomless (MRL) hydraulic elevators remotely by having easy outside access, without needing to be in the pit. Many functional valves such as self-closing manual lowering valve, hand pump, slack rope valve, pressure relief valve, manual lowering speed adjustment, ball valve as well as a manometer have been added to a compact body. MRL-H can be located up to 6 metre (19 feet) away and 5 metre (16 feet) high from the main power unit to a convenient location for easy access. MRL-H can be optionally delivered with pipes and necessary accessories upon request. Output port: ½" BSP Pressure switch port (2 times): ¼” BSP Suction port: ¼" BSP Pressure range: 0-100 bar (0-1450 psi) Return port: ¼” BSP Oil Viscosity: (25-60) cSt. bei 40°C (15-35 cSt. at 120°F) max. suction height: 5 m (with PVC-pipe inside-Ø6 mm); check valve recommended at suction point for pipe length longer than 1 m Options: check valve PVC-pipe set (2x6m) 74,2 Pressure switch connection ¼" Blain Hydraulics GmbH Pfaffenstrasse 1 74078 Heilbronn Germany Designer and Manufacturer of the highest quality control valves & safety components for hydraulic ele

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Hydraulic MRL Service Unit Pressure port Tank port Suction port Filter Check-Valve (suction) Check-Valve (Pressure line) Main shut-off valve (built in) Slack rope valve Manual lowering Shut-off valve for pressure gauge and test port Manual down speed adjustment Hand pump Air bleed Relief valve Pressure switch 1-10 bar Pressure switch 1-100 bar Connections: The output port (½") connected to the cylinder line, the oil suction (¼") and return (¼") ports to the main tank. Use polyamide oil suction and return pipes with a inside diameter of 6 mm and a outside diameter of 8 mm minimum. To lower the...

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Hydraulic MRL Service Unit MRL

Hydraulic MRL Service Unit MRL

Catalog excerpts

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