

Add to Cart
Emerson Fisher CS400 Series Commercial Pressure Reducing Valve Gas
Regulator
Fisher CS400 Series direct-operated, spring-loaded regulators
provide pressure-reducing applications for commercial and light
industrial installations. This flexibility is provided by the
numerous body sizes and end connections, outlet pressure settings,
orifice sizes, as well as the option for internal or external
pressure registration. In addition to application flexibility, the
CS400 Series offers multiple overpressure protection options to
meet your demands on application requirements.
Features
* Wide Variety of Body Sizes and End Connections
* Fixed Factor / Pressure Factor Measurement (PFM) Accuracy
Capabilities
* Field Convertible from Internal Sensing to External Sensing for
Wide-Open Monitor Construction
* Available in Gray Cast Iron, Ductile Iron, and Steel Body
Materials
* Only Standard Tools Required for Pressure Adjustment and Orifice
Removal
* Easy to Maintain
Specifications
Body Material, End Connection Size and Styles, Pressure Rating
Gray Cast Iron,1-1/2”NPT* 1-1/2”NPT and 2”NPT*2”NPT
175psi/12.1bar
Ductile Iron, 1-1/2”NPT* 1-1/2”NPT and 2”NPT*2”NPT
290psi/20bar
Maximum Inlet Pressure
175 psig / 12.1 bar ,See Table 2
Outlet Pressure Ranges
Regulator: See Table 5
Pressure Registration
Internal or External
Approximate Weight:With Threaded Body
Type CS400: 5 kg
PED Conformity Statement and Information
The CS400 Product Series is in conformity with the Pressure
Equipment Directive PED 97/23/EC.The exception to this previous
statement is the Type CS403 which is not yet certified to conform
with the PED Directive.
Pressure regulator does not require any supplementary upstream
safety accessory for protection against overpressure compared with
its design pressure PS, when upstream reducing station is sized for
a max downstream incidental MIPd <= 1.1 PS.
Principle of Operation
Type CS400 Base Regulator Operation
Refer to Figure of Fisher CS400 Series When downstream demand
decreases, the pressure under the diaphragm increases. This
pressure overcomes the regulator setting (which is set by the
regulator control spring). Through the action of the pusher post
assembly, lever, and valve stem, the valve disk moves closer to the
orifice and reduces gas flow. If demand downstream increases,
pressure under the diaphragm decreases. Spring force pushes the
pusher post assembly downward, the valve disk moves away from the
orifice, and the gas flow increases downstream as the regulator
opens in response to the decreased pressure underneath the
diaphragm.
The Type CS400IR regulator includes an internal relief valve for
overpressure protection. If the downstream pressure exceeds the
regulator setting by 7 to 28 inches w.c. / 17 to 69 mbar (depending
on the main spring used), the relief valve opens and excess gas is
vented through the stabilizer vent in the upper spring case.
General Installation Instructions
Before installing the regulator,
Installation Location
The installed regulator should be adequately protected from
vehicular traffic and damage from other external sources.
Table 5. Outlet Pressure Ranges
Type | OUTLET PRESSURE RANGE | SPRING | SPRING WIRE DIAMETER | SPRING FREE LENGTH | ||||
COLOR | Inch | mm | Inch | mm | ||||
CS400 | 3.5 to 5" w.c. / 9 to 12 mbar | Red | 0.098 | 2.49 | 4.18 | 106 | ||
4.5 to 6.5" w.c. / 11 to 16 mbar | Purple | 0.080 | 2.03 | 4.32 | 110 | |||
6 to 8" w.c. / 15 to 20 mbar | Gold | 0.108 | 2.74 | 4.18 | 106 | |||
7.5 to 11" w.c. / 19 to 27 mbar | Blue | 0.110 | 2.79 | 4.40 | 112 | |||
10 to 14" w.c. / 25 to 35 mbar | Unpainted | 0.110 | 2.79 | 4.40 | 112 | |||
12 to 19" w.c. / 30 to 47 mbar | Green | 0.112 | 2.85 | 4.70 | 119 | |||
18" w.c.to 1psig / 45 to 69 mbar | Orange | 0.120 | 3.05 | 4.94 | 125 | |||
1 to 2 psig / 69 to 138 mbar | Black | 0.140 | 3.56 | 4.66 | 118 | |||
2 to 5.5 psig/ 138 to 380 mbar | Yellow | 0.172 | 4.37 | 4.42 | 112 |