Four ported valves are generally used
to operate double-acting cylinders or actuators.
They have four or five pipe connections, commonly called ports:
- One pressure inlet.
- Two cylinder ports providing pressure to the
double-acting cylinder or actuator.
- One or two outlets to exhaust pressure from the
cylinders.
In a de-energized position, pressure is
connected to one cylinder port; the other port is connected to the
exhaust. In an energized position, pressure and exhuast are reversed.
Four ports means less piping is required. With five ports, independent
speed controls can be mounted in each port
Three Types of Operations Apply:
Single Solenoid
When the solenoid is
energized, the valve shifts, then returns to the original position when
de-energized.
Dual Solenoid
When one solenoid is energized, the valve shifts, then returns when the
other solenoid is energized. They may be energized momentarily or
continuously, but never concurrently. Some valves, both single and dual
solenoid, may change position on loss of fluid pressure.
Single Air Operator
When the operator is pressurized, the valve shifts, then returns when
the presure is removed.
Standard Optional Features:
Solenoid valves are supplied, as listed, with
either Red-Hat II molded epoxy solenoids or Red-Hat solenoids with
metal enclosures. Red-Hat II valves are identified by the letter
"G" or "H" in their catalog numbers e.g., 8344G27.
Many optional features may be added to your valves; e.g.,
high-temperature Class H molded coils, manual operators, and metering
devices. See the Optional
Features Section for details.
4 and 5 Ported Valve Flow Diagrams:
|
|
|
De-Energized |
|
Typical 4 Ported
Single
Solenoid
De-Energized
Energized
|
|
Dual
Solenoid
Solenoid A
Last Energized
Solenoid B
Last Energized
|
|
|
|
|
|
Energized |
|
Typical 5 Ported
Single
Solenoid
De-Energized
Energized
|
|
Dual
Solenoid
Solenoid A
Last Energized
Solenoid B
Last Energized
|
|
|
Index:
8340
Series - 2 Position Air-Only Solenoid Valves
Direct Acting - Aluminum Body - In-Line, sub-base
and Group Mounted - ¼" N.P.T.
8342
Series - General Service Solenoid Valves
Direct Acting 2 Position - Brass or Stainless Steel
Bodies - ¼" and ³/8" N.P.T.
8344
Series - General Service Solenoid Valves
Pilot Operated 2 Position - Brass Body - ¼"
and 1" N.P.T.
8345
Series - General Service Solenoid Valves
Pilot Operated 2 Position - Brass Body - ¼"
N.P.T.
8401/8402
Series - Miniature Directional Control Valves
Pilot Operated 2 Position - Aluminum Body - Sub-Base
and Manifold Mounted - ¹/8" and ¼" N.P.T.
8551
Series - Pad Mounted Valves
Pilot Operated 3 Way N/C - 4 Way - Aluminum or 316
s.s. Bodies - ¼" N.P.T.
8380/8401
Series - Pad Mounted Pilot Valves
Non-Metallic 3 Way and 3 and 4 Way
8047/8408/8410
Series - Manual Reset Solenoid Valves
Brass Body - ¼" and 1" N.P.T.
