4
Guard external moving parts
. Unguarded external moving parts expose personnel to pinch points,
which could result in serious injury or death.
•
Never operate this equipment without guards attached.
•
Any accessory or auxiliary components installed with this equipment must have protective
guarding correctly installed and permanently fastened in place.
Lockout/Tagout all sources of energy and relieve pressure
in accordance with the owner/employer’s
procedure for the control of hazardous energy before installing, servicing, or maintaining this
equipment or removing any access doors above, below, or on the valve itself. Potential sources of
energy include but are not limited to: motors, switches, cylinders, and solenoids. Also consider:
•
Equipment may start remotely, without warning, if energized.
•
For air actuated units, even if all sources of energy are locked out, there may be residual air
pressure in the actuator that must be relieved. Block further pressurizing with the lockable
in-line vented isolation valve. (See "Isolating Energy with Vented Isolation Valve" subsection
on page 5.)
•
If electrical devices are part of the equipment, hazardous voltage exists and presents the
risk of electrical shock.
•
Equipment may be under pressure – pressurized gas and material could cause serious injury
or death.
•
Equipment surfaces may be hot; allow them to cool before performing any work.
Always ensure that any electrical devices present are properly grounded in accordance with OSHA, the
National Electric Code (NEC), and local codes. Failure to do so could expose personnel to hazardous
voltage which could lead to serious injury or death.
HAZARD IDENTIFICATION
Principle of operation
Double Flapgate Valves are components that are used as an airlock transition point, sealing pressurized
systems against loss of air or gas while maintaining a flow of material between components with
different pressures. They are a particularly versatile component that can be utilized in a wide variety
of material handling applications. By their nature, the valves are of no use by themselves; they are only
useful when added as a component to a material handling system as part of a larger process.
Amputation hazard
The Double Flapgate Airlock Valves use a common mechanical principle which creates an internal pinch
point in order to function properly: a metal plate, driven by a powerful actuator, rotates around an axis
from a hinged position to mate with a metal sealing surface.
If either the inlet or discharge openings are left unguarded, the Double Flapgate’s moving plate
presents a serious personal injury hazard, including but not limited to amputation. Any part of the
human body in the way of the plate and the housing will be crushed or cut off.
Failure to have these guards installed could lead to serious personal injury.
Your electro-mechanically actuated Double Flapgate Airlock Valves should now be ready for startup.
See the appropriate section for instructions.
GRAVITY ACTUATION INSTALLATION
These valves typically come completely assembled; however, the counterweights may need to be
adjusted during initial startup. See the appropriate section for instructions.
SECTION V
OPERATION/STARTUP
Prior to use, the operator must read and understand all the safety-related
information including all warnings and guarding instructions. Verify that all guarding is in place and
area is clear of all non-essential personnel. Failure to do so could lead to serious injury or death.
As discussed in the Product Description Section, your Double Flapgate Airlock Valve will be one of
the following types: Pneumatically driven operation
, Electro-Mechanical
or Gravity actuated with
counterweights.
When operating this Equipment:
Instructions in this manual must be followed.
Do not operate this Equipment in excess of its rated capacity, speed, pressure or temperature.
Exceeding the operating parameters could damage the valves and void the warranty.
PNEUMATIC ACTUATION OPERATION
Once all of the pneumatic control components have been installed, electrical components wired
and the Double Flapgate Valve is properly and safely attached to the upstream and downstream
equipment
(See “HAZARD IDENTIFICATION” section)
, including all access doors being securely
closed, the valve may be test-cycled and set up for regular operation. The Double Flapgate Valve
was run at the factory and the controls were set, however, the following adjustments may be made:
1. The timer may be adjusted to set the number of gate cycles per unit time. Set the timer to cycle
the gates at a rate appropriate for the application. As the timer relays go on and off, the control
output power is cycled to the solenoid valves, alternating the pressurized air supply to the front
and rear of each cylinder and thereby operating the valves. After start-up, the timer may be
adjusted to tune-in the operational cycle. Refer to the timer vendor information for details.
2. The flow control valves may be adjusted to tune-in the open and closed positions on each valve
to eliminate the flap slamming shut. If valves are slamming open or closed, or plant air pressure
is low, adjustments may be necessary to control the flow to and from the actuators. The flow
control valves are connected to the solenoid: one controls the closing speed of the gate while
the other controls the opening speed.
13
Summary of Contents for C Series
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