产品名称：42-200高精密减压阀Precision Pressure Regulators

Features & Benefits：
Multi-stage, low-droop precision regulators maintain constant output over wide changes in flow and supply pressure
Epoxy powder coat paint delivers improved corrosion resistance
Wide selection of regulated pressures [1" to 450 psi] affords application versatility
Patented Nullmatic pressure regulation system providesreliable maintenance-free operation

Description
The Models 40, 41, and 42 Precision Pressure Regulators control air pressures in applications where precise and
dependable regulation is required, such as pneumatic instrument circuits, test stands, production checking fixtures,
and industrial air gages. As such, they are suitable for dead-end service, and flows up to a maximum of 110 scfm.
A unique, two-stage piloted design provides outstanding accuracy. Rugged construction—with no links, levers,
pivots, or other friction-producing members—ensures reliable, maintenance-free operation. These features allow
a regulator to maintain constant output pressure, regardless of even the widest changes in flow or supply pressures. In
fact, a regulator using a Model 40, 41, or 42 is practically a self-contained pressure controller operating its supply-
plunger valve via a built-in, high-gain pneumatic amplifier.A fine-turn, precision screw is used to manually load the
range spring, which sets the regulated pressure. When the adjusting knob is turned clockwise, the increased spring
force is exerted on the top diaphragm assembly,decreasing the nozzle clearance and increasing the pilot pressure. Because the source for pilot pressure is supply air flowing to the pilot pressure chamber through the restriction
screw, the increased pilot pressure forces the exhaust diaphragm assembly downward. This action closes the exhaust port, and contacts and moves the valve plunger,which opens the supply port. This increases the regulated output, which also feeds back to the top diaphragm assembly. The regulator locks-up or throttles at the new output value when the feedback force of the top diaphragm assembly equals the range spring force.A safety release valve is incorporated in the top diaphragm assembly of several models. It operates if the regulated pressure increases 3 tnÚ psig more than the set pressure and exhausts air through the atmospheric vent in the top housing. Overpressure causes the diaphragm to move upward, which opens the safety release valve.

Specifications
Resolution Adjustment
Better than 0.03º of regulated output
Supply Pressure
Maximum & recommended pressures are listed on page 220
Minimum: 5 psig above regulated output
Supply Pressure Effect
Nominal ratio of change in regulated pressure for a change
in supply
  1:150 for Model 40 and 42
  1:100 for Model 41
Ambient Temperature Limits
-40 to 180ºF (-40 to 80ºC)
Ambient Temperature Effect
Approximately 1% of set pressure with standard range
spring; and approximately 0.1% with Isothermal spring for
50°F (27ºC) temperature change
Knob Adjustment
Model 40 & 42: Nominal 10% of full range for one complete turn
Model 41: Nominal 15% of full range for one complete turn
Droop Effect
See Graph 1
Maximum Air Flow
See Graph 2

Air Consumption
See Graph 3
Drift Effect
See Graph 4
Exhaust-Flow Rate (at 25-psig setting)
Pressure rise of 0.25 psig will result from flow of:
  Model 40: 1.5 scfm
  Model 41: 2.4 scfm
  Model 42: 1.7 scfm
Maximum Flow Capacity
See Graph on page 219
Standard Mounting
In-line pipe or flush panel up to 1/4" thick (bushing for 3/4"
thick panel is optional)
Connections: (supply and outlet)
  Model 40: 1/4" NPT
  Model 41: 1/8" NPT
  Model 42: 1/2" NPT
Materials of Construction
 
(and materials in contact with
regulated media)
Brass, stainless steel, Neoprene, aluminum, and zinc

Accessories
P/N 2932-19 - Mounting Bracket
 for surface mounting
(Model 40 and Model 42)
P/N 10963-73 - Mounting Bracket
 for surface mounting
(Model 41)
P/N 3603-22 - Locknut

Options
Air Loading
Provision for supplementary air loading (100 psig max) in
addition to spring loading
Model 40, 42: 1/4" NPT
Model 41: 1/8" NPT
Model 40-2: Not available
Add [A] into the model number.
Example: 40A15
Tapped Exhaust
Provision for piping exhaust flow away from the regulator
Model 40, 42: 1/8" NPT
Model 41: Not available
Add [E] into the model number.
Example: 40E15
Isothermal Range Spring
Reduces ambient temperature effect from approximately
1% of set pressure to approximately 0.1% for a 50°F
[27°C] temperature range
Model 40: 15, 30, 50, & 100 psig ranges
Model 41: Not available
Model 42: 30, 50, & 100 psig ranges
Add (M9) to the Moore 40 number.
Add (M26) to the Moore 42 model number.
Example: 40-15M9, 42-30M26
Deletion of Safety Release Valve (SRV)
The SRV increases exhaust flow capacity when the
regulator must exhaust large flows. Deletion of the SRV will
improve drift characteristics (see Graph 4). The SRV is not
available with the Moore 41. It is standard with:
Model 40: 2, 7, 15, 30, 50 & H50 pressure ranges
Model 42: 15, 30, 50, H30, & H50 pressure ranges
To delete the SRV, add an [X] into the model number.
Example: 40X15
Slotted Adjusting Screw
Available for all models. This option provides for screw-
driver adjustment of the regulator and includes a locknut.
Model 40: Add (M3) after the model number
Model 41: Add (M3) after the model number
Model 41: Add (M20) after the model number
Example:
 
40-15(M3)
Locknut with Longer Adjusting Screw
Available for all models. This option prevents inadvertent
regulator adjustment.
Model 40: Add (M13) after the model number.
(Note: The Model 40-2 is standard with the lock nut.)
Model 41: Add (M5) after the model numberor order

accessory P/N 3603-22.
Model 42: Add (M3) after the model number
Example: 40-15(M3)
Bushings
for mounting on panels up to 3/4" thick
(Standard maximum is 1/4" thick).
 Model 40: Add (M41) after the model number
 Model 41: Not available
 Model 42: Add (M14) after the model number
 Example: 40-15(M41)