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5 Consult “Precautions” page 327 before use, installation or service of MAC Valves.. Introduction II. MAC’ s 4-W A Y PILOT SYSTEM – Maximized Shifting Forces The balanced 4-way pilot valve provides maximum shifting force…
4
Consult “Precautions” page 327 before use, installation or service of MAC Valves..
Introduction
EAINEB
BA
•
Balanced poppet, with no seals of any kind in a bore - no friction
•
New patented MAC solenoid
®
with “oval” shaped armature - provides high
shifting force through more core iron and magnet wire
•
Balanced poppet - high shifting forces - unaffected by fluctuations in air pressure
•
Short stroke direct operated poppet valve (patented adjustable inlet seat controls
stroke) - high shifting force - without small piston and no minimum operating
pressure
•
Large orifice “0.0024 in
2
”minimum - resists clogging
•
Strong return spring - high shifting force - even at low pressure
•
Few parts - simple design
•
Patented conical shaped exhaust seats act as cushions
- eliminates cutting - long life
•
Every valve calibrated for flow for a given coil wattage - consistent flow
DIRECT OPERATED 10 MM DESIGN
WITH OVAL SHAPED ARMATURE
DIRECT SOLENOID POPPET VALVE
Short Stroke = High solenoid force
Short Stroke = High return spring force
Short Stroke = Low current to shift solenoid
SHORT STROKE
SOLENOID FORCE
SOLENOID STROKE
Oval Armature
Additional Net
Shifting Force
OVAL ARMATURE
ROUND ARMATURE
{
solenoid force curve
5
Consult “Precautions” page 327 before use, installation or service of MAC Valves..
Introduction
II. MAC’s 4-WAY PILOT SYSTEM – Maximized Shifting Forces
The balanced 4-way pilot valve provides maximum shifting forces in both directions by supplying air alternately to each end section of
the spool, similar to double acting rodless cylinder. This system provides maximized shifting forces, equal forces at energization and
de- energization, with no resistance to shifting at either end. The result is increased shifting reliability and faster, more consistent
response times.
P
New concept : 4-way pilot
Small direct 4-way
solenoid operated valve
Solenoid pilot
operated large valve
EXHAEXH B IN
Valves that don’t stick
SHIFTING FORCES unaffected by
changing air pressure (IN/EXH)
- BALANCE -
SHIFTING FORCES virtually unaffected
by typically contaminated air
- WIPING ACTION -
Low friction minimizes resistance
to SHIFTING FORCES
- MINIMAL FRICTION -
HIGH SHIFTING FORCE
(Energize)
HIGH SHIFTING FORCE
(De-energize)
SOLENOID
VALVE
SPRING
ENERGIZED
4-WAY PILOT
VALVE
DE-ENERGIZED
4-WAY PILOT
6
Consult “Precautions” page 327 before use, installation or service of MAC Valves..
Introduction
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