Rhino
R
VE Bulk Unloaders, 125-mm Frame
11
Part 1608271-04
E
2019 Nordson Corporation
Table 5 Unloader Major Components
Item
Description
1
Pump:
The pump is an air-operated, dual-acting positive-displacement pump. The pump
consists of an air motor and a hydraulic section. It can handle high-viscosity materials as
well as certain abrasive-filled materials.
2
Solvent Chamber:
The solvent chamber surrounds the pump plunger. The solvent
chamber contains fluid that lubricates the plunger and packing gland seals. This fluid keeps
material from hardening on the plunger and minimizes wear on the packing gland seals.
3
Bleed Valve:
The bleed valve is designed for use as a bleed port at the highest point of the
pump hydraulic section. This port is used to bleed air from the pump section during initial
startup and container changes.
4
Drum Centering Shoes:
The drum centering shoes are designed for positioning the
material container below the follower plate. Drum centering shoes are only available for
large frames.
5
Follower Plate:
A typical follower plate has rubber seals that create a sealed compartment
when lowered into a material container. The downward movement of the follower plate
forces material into the hydraulic section of the pump.
NOTE:
The follower plate is application-specific and is not included with the unloader.
6
Bleed/Blow-off Port:
During material container changes, the bleed/blow-off port is used to
relieve the air between the follower plate and the material container. When the bleeder stem
is removed, air and material exits through the follower plate blow-off port.
7
Material Outlet Check Valve:
This check valve prevents material back-flow into the pump.
It is standard equipment on automatic crossover units.
8, 9, 10
Blow-off Assembly:
The blow-off assembly consists of the blow-off stem, blow-off hose,
and blow-off valve. The blow-off stem connects to the blow-off port on the follower plate.
The blow-off hose connects to the blow-off stem. When the blow-off valve is activated, the
blow-off stem forces air beneath the bottom of the follower plate and into the container. This
pressure forces the container off of the follower.
11
Elevator Control Valve:
The elevator control valve initiates ram movement. Placing the
valve in the
Up
position raises the elevator and the follower plate; placing the valve in the
Down
position lowers the elevator and follower plate assembly into the material container;
and placing the valve in the
Neutral
position stops elevator movement.
Neutral
is not a
locked and secured position. The follower plate may drift downward over time.
NOTE:
The elevator control valve is replaced with the Ram Control Module (17) on
CE Unloader versions.
12
Elevator Air Regulator:
The elevator air regulator controls the air to the elevator cylinders.
13
Air Motor Regulator:
The air motor regulator controls the air to the pump.
14
Pressure Relief Valve:
The pressure relief valve is used in the air supply circuit to limit the
maximum pump output pressure to the pump air motor.
15
Flared Solvent Cup:
The flared solvent cup prevents pinch-points during unloader
operation:
S
Air motor piston rod
S
Hydraulic section plunger
S
Solvent cup
16
Drum In Position Switch:
This switch activates when a drum is positioned onto the frame.
Continued...
