Model P3 - Cashco, Inc.
TECHNICAL BULLETIN
P3-TB
11-12
Model P3
Two Stage Cylinder Gas
Pressure Reducing Regulator
The Model P3 is designed for gases with inlet
pressures up to 3600 psig (248 Barg). Standard adjustable
outlet ranges from 1-10 (.07-.69 Barg) thru 10-500 psig
(.69-34.5 Barg). Flow coefficient of 0.02, 0.06, and 0.20
available. This versatile cylinder gas regulator can be
ordered with a variety of options to meet your system demands. Standard construction includes 40 micron integral
filter and diffusion resistant stainless steel diaphragm.
Gauges and CGA fitting is optional.
GENERAL SPECIFICATIONS
TYPICAL APPLICATIONS
•
•
•
•
•
Cylinder Gas
Carrier Gas
Calibration Gas
Laser Gas
Medical Gas
Inlet / Outlet
Size:
1/4”, 3/8" & 1/2"
(DN8, DN10 & DN15)
Maximum Inlet
Pressure:
3,600 psig (248.2 Barg)
Outlet Pressure:
FUNCTIONAL PERFORMANCE
1-10 psig (.07-.69 Barg)
2-25 psig (.14-1.7 Barg)
2-50 psig (.14-3.4 Barg)
2-100 psig (.14-6.9 Barg)
3-250 psig (.21-17.2 Barg)
5-500 psig (.34-34.5 Barg)
Supply Pressure
Effect:
0.01/100 psig (0.0007/6.9 Barg)
Temperature
Coefficient:
0.16 psig/ oF (0.01Barg/ oC)
Design Proof
Pressure:
7,200 psig (496.4 Barg)
Design Burst
Pressure:
14,440 psig (995.6 Barg)
Internal Volume:
13.8 cc
Wetted
Trim Material:
See Table 3
Design Leakage
Outboard:
Inboard
1x10-9 scc/sec He
1x10-9 scc/sec He
Cv Capability:
0.02, 0.06 and 0.20
Max Temperature:
PCTFE
Polyimide
TFE
-45 to 185oF (-42.7 to 85oC)
-45 to 575oF (-42.7 to 301oC)
-45 to 275oF (-42.7 to 135oC)
Body End
Connections:
Body and
Spring Chamber
Material:
Composite Knob
(Standard)
FNPT
CGA End Connection
316L SST/316L SST
Brass/6061 AL
-50 to 200oF (-45.6 to 93oC)
For temperatures outside
(Std.) knob range see Options
for Colored Knobs.
OPTION DEFINITION FOR TABLE 9
Captured Vent - (N, D, or E)
The captured vent feature is designed to safely vent process fluid when handling toxic or hazardous media. The user can
easily pipe this vent to a safe location. It features a 1/8” FNPT port located on the spring housing. This feature can be
incorporated into a self-relieving regulator that provides an additional port to permit the piping away of the expelled media.
Cleaned for Oxygen Service - (M)
This is a requirement for gaseous oxygen environments. All regulators requiring advanced cleaning shall be
processed according to strict guidelines. NOTE: Design Pressure Rating shall not exceed 290 psig (20.0 Barg) when
body material is SST and process medium is oxygen.
Diaphragm Valve - (F)
The diaphragm valve is a shutoff valve. The resolution is course. The extended leg allows easy access to the knob
when it is attached to a regulator. The valve is 1/4” male x 1/4” female outlet. This type of valve is sold about 90% of
the time.
Mounting Bracket - (5)
The mounting bracket is a base, or step type. The material is 303 stainless steel. The bracket mounts to the back of
the single stage, and back pressure regulators, via 10/32 screws.
Packed Valve - (G)
The packed valve is a metering valve. The resolution is very fine. The packing around the stem is Teflon. The
valve is 1/4” male x 1/4” male outlet.
Panel Mount - (A or B)
The panel mount feature requires a panel cut out of 1–3/8”, complete with a threaded spring housing, and a panel mount
ring to secure the regulator.
Relief Valve - (H, J, K, or L)
The relief valve main function is to relieve excess downstream pressure due to system malfunctions. This feature
prevents over pressurization by automatically venting of gas or liquid. The valve is fully adjustable and is
1/4” male x 1/4” male.
Tamper Proof - (1)
In this feature the control knob is removed and replaced with an acorn nut. The user can set the outlet pressure and
securely tighten the nut, preventing any unwanted adjustments on the regulator.
Colored Knobs - (2, 3, 4, 5, 8, 9 and W)
In this feature the control knob is anodized aluminum either in black, gold, chrome, purple, blue, green or red, compared
to the standard red composite knob. This allows for color coding of processes. Temperature range: -55 to 300oF (-45.6
to 149 oC).
NACE Construction - (Z)
Internal wetted portions meet NACE standard MR0175, when the exterior of the regulator is not directly exposed to
a sour gas environment, buried, insulated or otherwise denied direct atmospheric exposure. SST/SST body/spring
chamber materials only. Inconel w/TFE liner, Inconel X-750 spring.
About Two Stage Regulators
Two stage regulators provide precise outlet pressure control of gases with variation in supply pressure. The P3 features
low operating torque, accurate adjustment and is capable of high flows with minimal pressure drop.
2
P3-TB
DIMENSIONS
English Units In. & lbs.
Size
A
1/4" & 3/8"
2.00
Wt
3
1/2"
2.48
3
Metric Units mm & kg
DN8 & DN10
50
1.3
DN15
63
1.3
Porting Configuration Guide
E
F
H
K
M
N
*
270o
180o
Sample
OUT
0o
IN
90o
* Used as a purge port.
P3-TB
3
MODEL P3 PRODUCT CODE
11/16/12
(COMPOSITE RED KNOB STANDARD)
P3
Table
1
Table
2
TABLE 1 - BODY SIZE / Cv
Size
1/4"
(DN8)
7
Table
5
Table
6
1
Body / Spring Chamber
CODE
0.06
2
316L SST / 316L SST *
S
0.20
3
Brass / 6061 AL
B
0.06
Table
8
Table
9
Table
9
Table
9
Table
9
A
TABLE 3 - TRIM MATERIALS
0.02
4
Table
7
TABLE 2 BODY & SPRING CHAMBER MATERIAL
CODE
Diaphragm , Seat Retainer,
Poppet & Poppet Spring
Seat Material
CODE
PCTFE
1
Polyimide
2
TFE
3
PCTFE
4
Polyimide
5
302 SST w/Tefzel ring,
316L SST, 316L SST,
Inconel X-750
* Select for NACE Construction
5
0.20
Inconel w/TFE liner,
Monel R-405, Monel R-405
Inconel X-750
6
7
TFE
6
0.06
8
PCTFE
A
0.20
9
Polyimide
B
TFE
C
0.02
1/2"
(DN15)
Table
4
Cv
0.02
3/8"
(DN10)
Table
3
TABLE 4 PORTING CONFIGURATION
Description
NACE - Inconel w/TFE liner,
316L SST, 316L SST,
Inconel X-750
TABLE 5 - END CONNECTIONS
CODE
E
F
See Porting
Chart
Hastelloy C-276 w/TFE liner,
Hastelloy C-276, Hastelloy C-276,
Hastelloy C-276
H
K
M
N
End Connection(s)
CODE
FNPT
1
CGA End Connection #320
4
CGA End Connection #330
5
CGA End Connection #346
2
CGA End Connection #350
3
CGA End Connection #540
A
CGA End Connection #580
H
CGA End Connection #590
L
CGA End Connection #660
R
PCTFE
P
TFE
R
TABLE 6 RANGE SPRING/OUTLET PRESSURE
Consult factory for other CGA connections.
Psig (Barg)
CODE
1 - 10 (.07 - .69)
1
2 - 25 (.14 - 1.7)
2
2 - 50 (.14 - 3.4)
3
2 - 100 (.14 - 6.9)
4
3 - 250 (.21 - 17.2)
5
5 - 500 (.34 - 34.5)
6
TABLE 9 - OPTIONS
When ordering a valve per one of
Cashco's special drawings, the code “X”
and the 5-digit number following override
all other options. Otherwise, proceed with
Tables 7 thru 9.
TABLE 7 - OUTLET GAUGE
Psig (Barg)
0 - 15 (0 - 1.0)
0 - 30 (0 - 2.1)
0 - 60 (0 - 4.1)
0 - 100 (0 - 6.9)
0 - 160 (0 - 11.0)
CODE
A
B
C
D
E
TABLE 8 - INLET GAUGE
OPTIONS
Psig (Barg)
CODE
0 - 15 (0 - 1.0)
A
0 - 30 (0 - 2.1)
B
0 - 60 (0 - 4.1)
C
0 - 100 (0 - 6.9)
D
0 - 160 (0 - 11.0)
0 - 300 (0 - 20.7)
0 - 600 (0 - 41.4)
0 - 1000 (0 - 69.0)
0 - 2000 (0 - 137.9)
E
F
G
H
I
No Option
CODE
OPTIONS
CODE
0
Relief Valve: 350-600 psig *
L
Panel Mount 1st Stage
A
Oxygen Cleaned Per Spec
#S-1134
M
Panel Mount 2nd Stage
B
Tamper Proof
1
Captured Vent 1st Stage
N
Black Knob
2
Captured Vent 2nd Stage
D
Gold Knob
3
Captured Vent 1st & 2nd Stage
E
Chrome Knob
4
Diaphragm Valve
F
Purple Knob
5
Packed Valve
G
Blue Knob
8
Relief Valve: 3-50 psig *
H
Green Knob
9
Relief Valve: 50-150 psig *
J
Red Knob
W
K
NACE Const. SST/SST
NACE Trim, Per MR0175
Z
0 - 300 (0 - 20.7)
F
0 - 600 (0 - 41.4)
G
0 - 5000 (0 - 344.9)
K
Relief Valve: 150-350 psig *
No Outlet Gauge
0
No Inlet Gauge
0
* When selecting Relief Valve indicate SET POINT PRESSURE in Special Instructions on
order. If outlet gauge is also specified, Body Port Configuration must have two oulet ports.
See Porting Guide page 3.
For Special Construction Other Than Above Contact Cashco for Special Product Code.
Cashco, Inc. d/b/a Sensiflo
P.O. Box 6
Ellsworth, KS 67439-0006
PH (785) 472-4461
Fax. # (785) 472-3539
www.cashco.com
email: sales@cashco.com
exportsales@cashco.com
Printed in U.S.A.
P3-TB
0 - 3000 (0 - 206.9)
J
1. NUMERIC digits assigned first in “ascending” order.
2. ALPHA designations are assigned second in “alphabetical” order.
3. Left justify.
4. Add “0” to all unused squares.
5. If insufficient quantity of squares, consult factory for proper code.
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