10
OPTIONAL LOCKOUTS
Valve is not suitable for man-safe conditions
due to potential for downstream leakage,
even in the closed and locked position.
Lockouts (if provided) are designed to prevent
unauthorized operation of the valve. They are
not designed to guarantee normal valve
performance if unauthorized operation is
attempted. The fit of the pin may allow the gate
to move up to 1.5 mm (
9
/
16
") from the closed
position. Unauthorized operation may result
in increased valve leakage, damage to the
operator assembly and the packing may be
compromised. Valve may require repair prior to
putting back in service.
Lockouts are designed to resist the normal
manual operating thrust. In order to assure
complete lockout compliance, any automatic
valve actuator must be placed in a ZERO
ENERGY STATE by isolating all potential energy
sources including electricity, operator supply
air or hydraulic fluids.
CAUTION
Valves supplied spring cylinders with the spring
compressed where the mechanical energy
cannot be placed in a ZERO ENERGY STATE.
Take extreme care when inserting and removing
the lockout pin. If the valve is actuated or the
opposing pneumatic force is removed during the
insertion process injury may occur.
NOTE
See Figure 16, for available lockout assemblies,
not all lockout options are available on all valves.
The following are the factory’s
recommendations for storage procedures
to retain maximum product integrity during
long term storage of 1 to 5 years.
The shelf life listed is a guideline and is not a
substitute for examination of cured material at
the time of intended use.
To maintain shelf life, spare seats should be
stored in accordance with the following.
1. Store at ambient temperature up to 30°C
(86°F), with 60 - 90% relative humidity away
from direct sunlight and at a minimum
distance of 4.6 meters (15 feet) away from
electric motors is mandatory.
2. Care must be taken to avoid storage in a
stressed condition such as piled too high or
on a plain pallet overhanging a sharp edge.
3. First in - first out inventory control should
be practiced.
4. The above elastomer shelf life guidelines
are for components that are not already
installed in a valve.
KEYSTONE
FIGURE PCS17 KNIFE GATE VALVES
INSTRUCTION, OPERATION AND MAINTENANCE MANUAL
L1: Pin style, both open and closed lock
positions, pin not included
L2: Pin style, open position only, pin not
included
L3: Pin style, closed position only, pin not
included
L4: Carbon steel bevel gear handwheel
lockout, does not require pin.
L5: Stainless steel bevel gear handwheel
lockout, does not require pin.
L6: Case hardened pin for use on L1, L2 or L3.
Order as L1L6, L2L6, or L3L6.
L7: Cable handwheel lockout for handwheel
valves only, not available on DN 750
(NPS 30).
FIGURE 16
open
closed
open
closed
pin
