High-purity stainless steel line regulators designed for analytical applications with non-corrosive or semi-corrosive gases.

Applications

• Point-of-use pressure regulation of high-purity gases used in chromatography or other analytical applications (see table below for details)

Design Features

• High-purity 316 stainless steel barstock body construction
• High-purity 316 stainless steel diaphragms
• Metal to metal seals minimize diffusion of contaminants
• 2” delivery pressure gauge
• Bonnet ported and threaded to pipe gases away from work area
• Bonnet threaded for panel mounting
• Body screw thread tapped for back mounting
• Available with outlet diaphragm valve
• 10 micron metal filter protects seat from contamination
• 1/4” or 1/8” compression tube inlet/outlet connection (1/4” FPT optional)
• Bonnet vent hole size: 1/8” NPTF

Materials of Construction

• Gauge: 316 stainless steel
• Body: 316 stainless steel
• Bonnets: Chrome plated brass barstock
• Diaphragm: 316 stainless steel
• Seat: Teflon
• Seals: Metal to metal 

Specifications

• Maximum Inlet Pressure: 3000 psig (2,760 kPa)
• Maximum Flow Rate (At 400 psig, N2):
          Model 3430A: 650 SCFH (305 SLPM)
          Model 3431A: 1100 SCFH (517 SLPM)
          Model 3432A: 2400 SCFH (1128 SLPM)
          Model 3433A: 3000 SCFH (1410 SLPM)
• Flow Capacity (Cv): 0.08
• Operating Temperature: -40°F to 140°F (-40°C to 60°C)
• Flow Direction: Right to Left
• Porting (Regulator Body): 1/4” NPT Female
• Porting Configuration: 2 High, 2 Low

No Lube Option

A small amount of polychlorotrifluoroethylene is added to the threads to facilitate assembly. For ECD, MS or AED applications where method detection limits are sub-ppm, it is recommended to use a No Lube (-NL) model.

Flow Curves

Flow Curves, 3420A/3430A Series

Instructions

Instructions, General Regulator

Drawing

Drawing, 3430A

3D Model

3430A

3430A-NV