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4 Consult “Precautions” page 327 before use, installation or service of MAC Valves.. Introduction EA IN EB BA • Balanced poppet, with no seals of any kind in a bore - no friction • New patented MAC solenoid ® with “oval”…
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Consult “Precautions” page 327 before use, installation or service of MAC Valves..
MAC VALVES INC. has earned a reputation as an innovator in solenoid air valve technology as is evidenced by our numerous global
patents.
MAC’s designs focus on offering customers the best performing products available on the market. Some of the key features MAC’s
products offer are:
- reliability - compact packaging
- speed - modularity
- repeatability - specific application modifications
- non lube service - low wattage
- ease of maintenance - broad electrical options
Many of these performance advantages are based on MAC’s high shifting forces. MAC’s patended oval shaped armature solenoid
and 4-way pilot technologies are two new concepts which result in extremely high shifting forces in small packages.
The patented Latching Solenoid is another new offering to the MAC product line. The latching solenoid provides the function of a
double solenoid operated valve utilizing only one solenoid.
I. OVAL SHAPED ARMATURE SOLENOID – Maximized Shifting Forces
Compared with typical round armature solenoids, the oval shaped armature design results in much higher shifting forces due to the
following:
• Increased coil windings (amp turns)
• Increased core iron volume
With more amp turns and core iron than conventional round armature designs, more shifting force is available to shift through
contaminated air resulting in reliable shifting valves.
Introduction
Oval Armature
Round Armature
Optimized
Use of space
Push Pin
Oval Shaped Armature New Concept
Oval Shaped Armature
Wasted space
Available space
used for increased
AMP Turns and Core
Iron Volume
=
Higher Magnetism
=
Higher Force
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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
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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