CleanFlow™ Instrument Grade Gas Conditioning Systems
Four engineered systems that turn pipeline gas into clean, dry, properly regulated gas for pneumatic instruments, actuated valves, and dry gas seal support — designed, manufactured, and tested at Welker since 1954.
CleanFlow™ Plus · Primary & Backup Filtration
Pipeline Gas In. Instrument-Grade Gas Out.
Pneumatic instruments and actuated equipment depend on a clean, dry, correctly regulated gas supply — but raw pipeline gas rarely qualifies. Welker's CleanFlow™ systems remove contaminants and liquids, step pressure down to a functional range, and, where required, condition gas temperature — protecting sensitive equipment from damage, clogs, and freeze-ups.
Three Functions, One Compact System
Filter
A Welker Filter Dryer strips contaminants and free liquids from pipeline gas as it enters the system, protecting every downstream component and instrument.
Regulate
An integrated regulator steps pipeline pressure down to the functional range required by pneumatic instruments and actuated equipment.
Condition
An optional catalytic heater brings gas to the desired temperature, preventing freezing and the service interruptions it causes.
Find Your Gas Conditioning System
Answer two questions about your application and we'll point you to the right CleanFlow™ configuration.
1. What is this system supplying?
2. What level of protection do you need?
The CleanFlow™ Family
Basic, CleanFlow™, and CleanFlow™ Plus share the same filtration foundation and step up in capability — regulation, then automatic backup — to match your application's criticality.
CleanFlow™ Basic
Contaminant & Liquid Removal
The essential entry point into the CleanFlow™ family. CleanFlow™ Basic pairs an active Welker Filter Dryer with a liquid dump — or stacks more than one active filter — to provide straightforward pipeline gas filtration for pneumatic instruments and pneumatically actuated equipment.
Key Features
- Active Welker Filter Dryer, or more than one active filter
- Automatic (ALD) or Manual (MLD) Liquid Dump
- Bracket or stand mounting
- No pressure regulation or heater — filtration only
Quick Specs
CleanFlow™
Contaminant & Liquid Removal With Pressure Regulation
CleanFlow™ adds pressure regulation to the filtration foundation of Basic — one active Welker Filter Dryer paired with a regulator (or one or more filters with regulation) to bring pipeline gas down into your instruments' functional operating range.
Key Features
- Regulator with active filter or filters
- Optional Automatic or Manual Liquid Dump
- Optional catalytic heater for cold climates
- Bracket or stand mounting
Quick Specs
CleanFlow™ Plus
Regulation With Automatic Backup Filtration
For applications where continuous supply is critical, CleanFlow™ Plus pairs a primary filter and regulator with a backup filter and regulator that activate automatically the moment the primary requires maintenance — eliminating service interruptions entirely.
Key Features
- Primary & backup Welker Filter Dryers with regulation
- Backup filter/regulator activates automatically on maintenance need
- Optional Automatic or Manual Liquid Dump
- Optional catalytic heater for cold climates
Quick Specs
CleanFlow™ Family Comparison
Match system capabilities against your application requirements to confirm the right configuration.
| Specification | CleanFlow™ Basic | CleanFlow™ | CleanFlow™ Plus |
|---|---|---|---|
| Filtration Options | Active Filter or > 1 Active Filters | Regulator with Active Filter or Filters | Regulator with Primary Filter & Regulator with Backup Filter |
| Pressure Regulation | ✗ Not included | ✔ Yes | ✔ Yes |
| Automatic Backup Filtration | ✗ | ✗ | ✔ Yes |
| Mounting | Bracket or Stand | Bracket or Stand | Bracket or Stand |
| Liquid Dump | ALD or MLD | Optional ALD or MLD | Optional ALD or MLD |
| Heater Options | N/A | Optional Heater | Optional Heater |
| Materials of Construction | Stainless Steel, Stainless Steel Regulator or Carbon Steel, Brass Regulator | ||
| Operating Pressure | Stainless Steel Model: 0–200 psig / Carbon Steel Model: 0–125 psig | ||
| Inlet / Outlet | 1″ FNPT | ||
CleanFlow™ F-31 Instrument Grade Gas Conditioning System
The F-31 stands apart from the CleanFlow™ family: it's a high-capacity, high-pressure filtration system purpose-built to provide a continuous supply of clean, dry gas to critical pneumatic instruments and industrial equipment — most notably as seal gas for compressors running dry gas seals.
Single, dual, or quad filter service configurations built around 2 or 4 of Welker's high-capacity F-31 Filter Dryers accommodate high-pressure, high-flow gas streams with a long service interval and simplified 4-step cartridge changeout.
- Seal support systems for centrifugal and reciprocating compressors with dry gas seals
- Upstream of pneumatically actuated emergency shutdown valves
- Upstream of sensitive pneumatic instruments in remote locations
CleanFlow™ F-31 · Quad Filter Configuration
*Temperature limited by valves. Contact Welker for optional specifications.
Ready to Configure Your Gas Conditioning System?
Our application engineers will help you select the right CleanFlow™ configuration — or the F-31 for dry gas seal support — for your pressure, flow, and site requirements.
