The Flomatic CDS3.5 1/2" Flo-Trol® CDS – stainless-steel automatic flow control valve with a rated flow of 3.5 GPM and a 1/2" F inlet × 1/2" M outlet configuration is engineered to maintain a constant flow rate across a wide pressure range. This NSF/ANSI 61 and 372 certified valve is rated for a maximum working pressure of 200 psi and a maximum operating temperature of 180°F (82°C), making it ideal for residential, commercial, and industrial applications requiring precise flow regulation.

The Flo-Trol® CDS series uses a flexible Buna-N flow-control orifice with no moving internal parts. As system pressure increases, the elastomeric orifice flexes to maintain a consistent flow within ±15% between 15 and 125 psi. The corrosion-resistant 304 stainless-steel valve body and laser-engraved markings provide long-term durability and easy identification.

CDS series – All stainless-steel body with NSF 61 approved Buna-N orifice. FNPT x MNPT threaded configuration per ANSI/ASME B1.20.1. Fully automatic flow control with no moving parts. Maximum working pressure 200 psi. Maximum temperature 180°F (82°C). Flow accuracy ±15% between 15–125 psi.

Specifications:

Max Pressure: 200 psi

Max Temperature: 180°F (82°C)

Body: 304 Stainless Steel

Orifice Material: NSF 61 Approved Buna-N

Flow Accuracy: ±15% (15–125 psi)

Connection: 1/2" F Inlet × 1/2" M Outlet (ANSI/ASME B1.20.1)

Flow Rate: 3.5 GPM

Inlet / Outlet: 1/2" F × 1/2" M

Weight: 0.22 lbs

Operation: Flo-Trol® automatic flow control valves maintain a steady flow rate by using a flexible elastomeric orifice that adjusts with pressure changes. This design eliminates mechanical components, ensuring quiet, maintenance-free service even under varying pressure conditions.

Construction: The Flomatic CDS valve body is manufactured from corrosion-resistant 304 stainless steel and paired with a precision-molded Buna-N flow-control orifice. Each valve is laser-engraved with the flow rate and size for simple field identification.

Proud to manufacture high-quality valves built to last since 1933, Flomatic® Valves is an American valve manufacturer certified under ISO 9001 and ISO 14001 quality and environmental management systems.

Features & Benefits:

• Automatic constant-flow control
• No moving internal parts
• ±15% flow accuracy between 15–125 psi
• All 304 stainless-steel construction
• NSF/ANSI 61 & 372 certified
• Buna-N elastomeric orifice
• Laser-engraved size and flow markings
• Compact, corrosion-resistant design
• Lead-free construction

Applications:

• Residential water systems
• Commercial water supply and distribution
• Irrigation and agricultural systems
• Filtration and treatment systems
• Industrial fluid control applications requiring precise flow

* Flow tolerance, dimensions, and materials per Flo-Trol® specifications.