Ross Controls RIGHT ANGLE - Manual (Page 9)

www.rosscontrols.com 9
1
2
3
Y3
Series 27 Manual Piloted Valves with L-O-X ® Control
Port Sizes up to 2 1/2 for Larger Systems
VALVE OPEN
With the red handle pulled out, pilot
air flows to the top of the actuating
piston, causing it to open the inlet
poppet. Supply air then flows freely
from inlet to outlet, and the exhaust
port is blocked. A detent keeps the
L-O-X ® handle in the open position.
The handle is designed not to be
locked in the open position, thereby
allowing for quick shut-off when
necessary.
VALVE CLOSED
With a short push of the red handle
inward the flow of supply air is
blocked and downstream air is
exhausted via the exhaust port. Air
pressure on the inlet and exhaust
poppets produces a large closing
force. The L-O-X ® valve should be
padlocked in this position to prevent
the handle from being pulled out-
ward inadvertently when potential
for human injury exists or servicing
machinery.
Following any FRL components, an energy isolation valve is usually
the first valve in the line supplying compressed air to equipment. The
energy isolation valve should provide a quick means of shutting off
the supply of air and exhausting the downstream lines.
The ROSS manual pilot L-O-X
® valve has a large red operating handle
for high visibility. A short, full inward push of the red operating handle
closes off the flow of air, and exhausts the pressure in the downstream
line. This action is swift and doesn’t require a difficult, slow, or confusing
twisting action.
Because of the poppet construction of the main valve body, air pressure
provides the forces both to open the valve and to close it. These are
large forces so that quick response is ensured even after the valve has
been on standby for a long time.
The exhaust port is threaded for the installation of a silencer or a line
for remote exhausting.
VALVE OPERATION
Operated just like the smaller manual
L-O-X
® valves shown on page 5. The
position of the red handle indicates
instantaneous full flow pressurizing or
exhausting capability. 1
2
3
1
2
3
A
B
C
For coordinating silencers, see page 18 (model numbers 5500A8001 and 5500A9002).
Port Size Valve Model Avg. Cv Dimensions inches (mm) Weight
In-Out Exh. Number* 1 to 2 2 to 3 A B C lb (kg)
1 11/2 Y2783A6006 23.0 34.0 7.4 (187) 8.6 (218) 6.4 (162) 7.0 (3.2)
11/4 11/2 Y2783A7006 30.0 32.0 7.4 (187) 8.6 (218) 6.4 (162) 7.0 (3.2)
11/2 11/2 Y2783A8016 30.0 31.0 7.4 (187) 8.6 (218) 6.4 (162) 7.0 (3.2)
11/2 21/2 Y2783A8006 68 70 8.4 (213) 10.2 (259) 6.6 (162) 15.3 (6.9)
2 21/2 Y2783A9006 70 70 8.4 (213) 10.2 (259) 6.6 (162) 15.3 (6.9)
21/2 21/2 Y2783A9016 70 71 8.4 (213) 10.2 (259) 6.6 (162) 15.3 (6.9)
STANDARD SPECIFICATIONS: For valves on this page
Ambient/Media Temperature: 40° to 175°F (4° to 80°C)..
Flow Media: Filtered air; 5 micron recommended.
Inlet Pressure:
Port sizes 1 to 2 1/2: 15 to 150 psig (1.0 to 10.3 bar).
Port sizes 1 1/2 to 21/2: 30 to 150 psig (2.1 to 10.3 bar).
*Body Paint: Yellow.
*Port Threads: NPT standard. For BSPP threads, insert a “D” after
“Y” to the model number, e.g.,YD2783C6006.
NOTE: Per specifications and regulations, these products are
defined as energy isolation devices, NOT AS EMERGENCY
STOP DEVICES.
L-O-X ® Sensing Port
L-O-X ® Sensing Port - Series 15 manual L-O-X ® valves and manual L-O-X ® valves with EEZ-ON ® operation are now provided with 1/8
NPT sensing ports, enabling installation of a pressure sensing device such as the Pop-Up Indicator or Pressure Switch shown below.
Standards suggest that machine design should include a method for verifying the release of energy after lockout.
The ROSS 988A30 Pop-Up Indicator is constructed for the industrial environment with a brass body and 1/8” NPT connection. It offers
360° visibility and a redundant verification feature. By pushing on the red plunger, the operator can “feel” the presence of pressure
and verify that the indicator is performing its sensing function.
The ROSS 586A86 Pressure Switch offers an electronic pressure sensing option that can be integrated into a safety monitoring system,
which confirms energy isolation throughout the circuit.