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ISTEC CORPORATION
Flow Measurement & Control
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Model B34 S Series Medium Duty Gas Regulator B34 S Series Medium Duty Gas Regulator

Appropriate for many commercial and industrial uses such as gas engines,burners, furnaces, and boilers. The rapid response of the B34 S is particularly well-suited for mid-range applications where quick on/off loads cause shock problems.

The B34 S Series is a spring-loaded self-operated regulator available with or without internal relief. It combines the B31 8" diaphragm case with the B34 valve assembly for an economical solution to mid-range commercial and industrial applications. Among its attributes are an adjustable loading ring for controlled boost at high flows, precision breather opening to ensure proper stability under all conditions, and in the R model, a high capacity internal relief valve. All critical parts are either steel or aluminum, not plastic, to ensure reliability.

FEATURES

  • Interchangeable Brass Orifice]
  • Molded Diaphragm Consisting of Buna-N and Nylon
  • Upper Diaphragm Plate of Plated Steel
  • Stainless Steel Lever Pin
  • Zinc with Dichromate-plated Steel Lever
  • One-piece Molded Buna-N Valve Seat
  • Alodined Aluminum Valve Stem
  • Dolrin¬Æ Vent Valve with Buna-N Seat
  • Spring-loaded Internal Relief Valve Assembly
  • Vent Sizes: 1/4", 3/8", 3/4" and 1"
  • Stainless Steel Vent Screen
  • Die Cast Aluminum Seal Cap
  • Field Interchangeable Adjustment Spring
  • CGA 6-18 Approved

BENEFITS

  • Economical
  • Space-saving Design
  • Protects Equipment from Shock Damage
  • Commercial Performance in a Compact Size

Model B34 S Series Medium Duty Gas Regulator Construction

Model B34 S Series Medium Duty Gas Regulator Dimensions

Model B34 S Series Medium Duty Gas Regulator Spring and Body Data

7" w.c. Set Point Characteristics Capacity Table

Model B34 S Series Medium Duty Gas Regulator Capacity Table 1

TYPICAL PERFORMANCE CURVES

Manufacturer: Actaris
Type and Model: B34SR
Regulator:
Inlet Size: 2" NPT
Outlet Size: 2" NPT
Orifice Size: 1/4" x 3/8"
Set Point 7.0" w.c. with 10 psig inlet @ 100 scfh. All test results are reported at a base of 14.7 psia and 60°F
Model B34 S Series Medium Duty Gas Regulator Performance Curves 1

RELIEF CHARACTERISTIC CURVES – R Model Only

Manufacturer: Actaris
Type and Model: B34SR
Regulator:
Inlet Size: 2" NPT
Outlet Size: 2" NPT
Vent Size: 1" NPT
Set Point 7.0" w.c. with 10 psig inlet @ 100 scfh. All test results are reported at a base of 14.7 psia and 60°F
Model B34 S Series Medium Duty Gas Regulator Characteristic Curves 1

14" w.c. SET POINT CHARACTISTICS

Model B34 S Series Medium Duty Gas Regulator Capacity Table 2

TYPICAL PERFORMANCE CURVES

Manufacturer: Actaris
Type and Model: B34SR
Regulator:
Inlet Size: 2" NPT
Outlet Size: 2" NPT
Orifice Size: 1/4" x 3/8"
Set Point 7.0" w.c. with 10 psig inlet @ 100 scfh. All test results are reported at a base of 14.7 psia and 60°F
Model B34 S Series Medium Duty Gas Regulator Performance Curves 2

RELIEF CHARACTERISTIC CURVES – R Model Only

Manufacturer: Actaris
Type and Model: B34SR
Regulator:
Inlet Size: 2" NPT
Outlet Size: 2" NPT
Vent Size: 1" NPTT
Set Point 7.0" w.c. with 10 psig inlet @ 100 scfh. All test results are reported at a base of 14.7 psia and 60°F
Model B34 S Series Medium Duty Gas Regulator Characteristic Curves 2

1 PSIG SET POINT CHARACTISTICS

Model B34 S Series Medium Duty Gas Regulator Capacity Table 3

Model B34 S Series Medium Duty Gas Regulator Capacity Table 4

TYPICAL PERFORMANCE CURVES

Manufacturer: Actaris
Type and Model: B34SR
Regulator:
Inlet Size: 2" NPT
Outlet Size: 2" NPT
Orifice Size: 1/4" x 3/8"
Set Point 7.0" w.c. with 10 psig inlet @ 100 scfh. All test results are reported at a base of 14.7 psia and 60°F
Model B34 S Series Medium Duty Gas Regulator Performance Curves 3

RELIEF CHARACTERISTIC CURVES – R Model Only

Manufacturer: Actaris
Type and Model: B34SR
Regulator:
Inlet Size: 2" NPT
Outlet Size: 2" NPT
Vent Size: 1" NPT
Set Point 1 psig with 10 psig inlet @ 100 scfh. All test results are reported at a base of 14.7 psia and 60°F
Model B34 S Series Medium Duty Gas Regulator Characteristic Curves 3

2 PSIG SET POINT CHARACTISTICS

Model B34 S Series Medium Duty Gas Regulator Capacity Table 5

Model B34 S Series Medium Duty Gas Regulator Capacity Table 6

TYPICAL PERFORMANCE CURVES

Manufacturer: Actaris
Type and Model: B34SR
Regulator:
Inlet Size: 2" NPT
Outlet Size: 2" NPT
Orifice Size: 1/4" x 3/8"
Set Point 2 psig with 10 psig inlet @ 100 scfh. All test results are reported at a base of 14.7 psia and 60°F
Model B34 S Series Medium Duty Gas Regulator Performance Curves 4

RELIEF CHARACTERISTIC CURVES – R Model Only

Manufacturer: Actaris
Type and Model: B34SR
Regulator:
Inlet Size: 2" NPT
Outlet Size: 2" NPT
Vent Size: 1" NPT
Set Point 2 psig with 10 psig inlet @ 100 scfh. All test results are reported at a base of 14.7 psia and 60°F
Model B34 S Series Medium Duty Gas Regulator Characteristic Curves 4

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