Material
Body and inserts are manufactured in stainless steel for durability and corrosion resistance.
Stainless SteelRobust
Constant Flow Valves
Industrial Valves — Flow Restrictors
Constant Flow Valves (Flow Restrictor Type REG)
Constant flow valves are compact flow restrictors designed to maintain a stable, repeatable water flow across a range of inlet pressures. They are typically used for flushed pump seals and vacuum pumps where consistent cooling / flushing flow is required.
Application & overview
Constant flow valves (Type REG) are used as simple, reliable flow restrictors for water. They help ensure stable flushing flow to protect equipment and improve reliability in auxiliary services.
Typical applications
- Flow restriction of water for flushed pump seals
- Constant flushing / cooling water for vacuum pumps
- Utility water circuits where stable low-to-medium flow is needed
- Supporting equipment protection by avoiding under/over-flushing
Flow restrictor type REG
- Body and inserts: Stainless steel
- Keeps constant flow under different pressures within ΔP range
- Compact dimensions suitable for easy installation
- Multiple flow rates available (0.5 to 16 L/min)
Features & operating limits
Key limits and performance conditions for safe, stable operation of Type REG flow restrictors.
Constant flow behavior
Designed to keep a constant flow rate within the specified differential pressure range.
Stable FlowΔP Controlled
Max operating pressure
Operating pressure up to 16 bar.
Max 16 barUtilities
Max service temperature
Service temperature up to 150°C.
Max 150°CHot Water
Differential pressure range (ΔP)
Minimum ΔP: 1.5 bar — Maximum ΔP: 10 bar.
Min 1.5 barMax 10 bar
Simple selection
Select primarily by required flow rate (L/min) and connection size.
Flow-BasedEasy Spec
* Verify the available differential pressure across the restrictor in your installation to ensure stable flow regulation.
Flow restrictor table (Type REG)
Stainless-steel flow restrictors with G 1/2" connection, fixed dimensions and multiple flow-rate options.
| Description | Type | Material | Denomination | L/min | G" | L | GT | Part No. |
|---|---|---|---|---|---|---|---|---|
| Flow restrictor | REG | Stainless Steel | Flow restrictor G 1/2 REG-1200-D | 0.5 | 1/2" | 42 | 14 | 90503-8200 |
| Flow restrictor | REG | Stainless Steel | Flow restrictor G 1/2 REG-1201-D | 1.0 | 1/2" | 42 | 14 | 90503-8201 |
| Flow restrictor | REG | Stainless Steel | Flow restrictor G 1/2 REG-1202-D | 2.0 | 1/2" | 42 | 14 | 90503-8202 |
| Flow restrictor | REG | Stainless Steel | Flow restrictor G 1/2 REG-1203-D | 3.0 | 1/2" | 42 | 14 | 90503-8203 |
| Flow restrictor | REG | Stainless Steel | Flow restrictor G 1/2 REG-1204-D | 4.0 | 1/2" | 42 | 14 | 90503-8204 |
| Flow restrictor | REG | Stainless Steel | Flow restrictor G 1/2 REG-1206-D | 6.0 | 1/2" | 42 | 14 | 90503-8205 |
| Flow restrictor | REG | Stainless Steel | Flow restrictor G 1/2 REG-1208-D | 8.0 | 1/2" | 42 | 14 | 90503-8206 |
| Flow restrictor | REG | Stainless Steel | Flow restrictor G 1/2 REG-1210-D | 10 | 1/2" | 42 | 14 | 90503-8207 |
| Flow restrictor | REG | Stainless Steel | Flow restrictor G 1/2 REG-1212-D | 12 | 1/2" | 42 | 14 | 90503-8208 |
| Flow restrictor | REG | Stainless Steel | Flow restrictor G 1/2 REG-1216-D | 16 | 1/2" | 42 | 14 | 90503-8209 |
* Table values are based on the provided product listing. If you need additional sizes/threads or project-specific variants, tell us your requirements.
Selection checklist
Send the details below and we’ll recommend the correct REG flow restrictor and flow rate.
Process & service conditions
- Service media (typically water) and purpose (pump seal flushing / vacuum pump / other)
- Inlet pressure and expected pressure range
- Available differential pressure (ΔP) across the restrictor
- Service temperature (confirm ≤ 150°C)
- Max operating pressure (confirm ≤ 16 bar)
Installation & sizing
- Required flow rate (L/min) at operating conditions
- Connection thread standard (here: G 1/2"), and any site preferences
- Space constraints / accessibility for maintenance
- Any filtration/strainer requirements upstream (if applicable)
- Documentation needs (datasheet, quotation, project references)
Need a quick recommendation?
Share your target flow (L/min), inlet pressure range, available ΔP, temperature, and connection standard. We’ll propose the right Type REG flow restrictor and provide a quotation.
FAQ
Quick answers for constant flow valves (flow restrictors) in utility water services.
What does a constant flow valve do?
It restricts water flow to a stable, defined rate over a range of pressures, helping maintain consistent flushing/cooling flow.
Why is differential pressure (ΔP) important?
Constant-flow behavior depends on having sufficient ΔP across the restrictor. For Type REG, ΔP should be between 1.5 and 10 bar.
Can I use it above 16 bar or 150°C?
The provided limits are 16 bar max operating pressure and 150°C max service temperature. If your duty exceeds these, share details and we’ll suggest an alternative solution.
Request a quotation & technical support
Send your requirements and we’ll respond with the right constant flow valve selection and pricing.
We’ll match the correct REG flow restrictor to your required L/min.
Please share flow rate, pressure range, available ΔP, temperature, and thread standard. We’ll provide a clear technical proposal and quotation.