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FLOW RESTRICTOR

The restrictor assembly reduces the initial Argonite pres-

sure from the discharge manifold to between 174 and

870 PSI (12 and 60 bar) before entering the discharge

piping. The size of the orifice within the restrictor is deter-

mined through calculations based upon the required flow

and discharge time.

Larger diameter restrictors, up to 4 in. (102 mm) connec-

tion, are available for very large system requirements. An

orifice plate is custom drilled to the specific requirements

of the project as determined by computerized flow calcu-

lations.

Note: Flanged restrictor for large system requirements.

Only the orifice plate is provided.

Figure 12. Flow Restrictor

Table 7. Flow Restrictor Sizes

Figure 13. Restrictor Female NPT/Female NPT,

Sizes 1/2-inch to 2 inches

Table 8. Flow Restrictor Data

Part Number Description

38-250001-xxx 2-1/2 in. Flow Restrictor

38-300001-xxx 3 in. Flow Restrictor

38-400001-xxx 4 in. Flow Restrictor

FLOW

BOLT*

CLASS 1500#

FLANGE*

NUT*

GASKET*

ORIFICE PLATE

RESTRICTOR

* PROVIDED BY

INSTALLER

Part Number

Flow Restrictor FNPT x FNPT Pipe Diameter

(NPT)

38-050003-xxx 1/2 in. (13 mm) Brass, Code 035 to 075

38-100003-xxx 1 in. (25 mm) Brass, Code 050 to 130

38-150003-xxx 1-1/2 in. (38 mm) Brass, Code 085 to 220

38-200003-xxx 2 in. (51 mm) Stainless Steel, Code 115 to 270

STAMPED WITH

ORIFICE DIA.

STAMPED WITH

PART NUMBER

CONNECTION FOR

DISTRIBUTION

PIPE WORK

NPT

38-XX0003-XXX