Process Connections

Process Port Options

Most Alicat pressure and flow instruments come with threaded female NPT process connections by default, but we offer many customization options, so you can incorporate your new Alicat into your existing plumbing. After you select a port type, your Alicat applications engineer will recommend a specific port size in order to minimize dead volume and ensure your full-scale flow rate can be achieved.

Available Process Connections
  • Threaded ports
    • NPT
    • SAE J1926
    • SAE AS5202
    • BSPP/G
  • Down port connections
    • NeSSI-compliant down port (NESSI)
    • Down port, mounting screws thread from below (DPORT)
    • Down port, mounting screws thread from above (TMDPORT)
  • Welded fittings
    • Compression (COMP)
    • VCR
    • VCO

Alicat also offers threaded compression fittings for our default NPT process ports.

NPT Threaded Ports (default for most instruments)

 

NPT Size Default Flow Ranges Whisper Series Flow Ranges
M5/10-32 UNF with 1/8” NPT fitting 0.5-50 SCCM 0.5-20 SCCM
1/8” 100 SCCM-20 SLPM 50 SCCM – 5 SLPM
1/4″ 50-100 SLPM 10-20 SLPM
1/2″ 250 SLPM 40 SLPM
3/4″ 500-2000 SLPM 50-500 SLPM
1”
1-1/4” 3000 SLPM
1-1/2”
2” 5000 SLPM 1000 SLPM

SAE J1926 Threaded Ports

 

Dash Size O-Ring Thread Process Boss Port Size Recommended Flow Ranges
M5 (10-32 UNF) 0.5-50 SCCM
2 5/16-24 1/8” 10-50 SCCM
4 7/16-20 1/4” 100 SCCM–20 SLPM
6 9/16-18 3/8” 50-100 SLPM
8 3/4-16 1/2” 250 SLPM
10 7/8-14 5/8” 250-1000 SLPM
12 1-1/16-12 3/4″ 1500 SLPM
16 1-5/16-12 1” 2000-3000 SLPM
24* 1-7/8-12 1-1/2” 5000 SLPM

SAE AS5202 Threaded Ports

 

Dash Size O-Ring Thread Process Boss Port Size Recommended Flow Ranges
4 7/16-20 1/4″ 100 SCCM-10SLPM
6 9/16-18 3/8” 20-100 SLPM
8 3/4-16 1/2” 250 SLPM

BSPP/G-Series Threaded Ports

 

BSPP/G-Series Size Recommended Flow Ranges
1/8” 100 SCCM-20 SLPM
1/4” 50-100 SLPM
3/8” 50-250 SLPM
1/2” 250 SLPM
3/4” 500-2000 SLPM

Ports with Welded Compression Fittings

 

Tube Size Recommended Flow Ranges
1/4″ welded compression 100 SCCM-100 SLPM
3/8” welded compression 50-250 SLPM
1/2″ welded compression 50-500 SLPM

Ports with Welded VCR Fittings

 

VCR Size and Gender Recommended Flow Ranges
1/8” welded VCR female 0.5-50 SCCM
1/4” welded VCR male 100 SCCM-100 SLPM
1/2″ welded VCR male 50-250 SLPM
1” welded VCR male 500-3000 SLPM

Ports with Welded VCO Fittings

 

VCO Size Recommended Flow Ranges
1/8” welded VCO 0.5-50 SCCM
1/4″ welded VCO 100 SCCM-100 SLPM
1” welded VCO 500-3000 SLPM
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