Flomatic CDH45 2 1/2" Flo-Trol® CDH – Stainless Steel Flow Control Valve (45 GPM)

The Flomatic CDH45 2 1/2" Flo-Trol® CDH – stainless-steel automatic flow control valve with a rated flow of 45 GPM and 2-1/2" M x 2-1/2" M threaded connections are designed for high-capacity, constant flow regulation over a broad 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 demanding commercial, industrial, and agricultural water systems.

The Flo-Trol® CDH series uses a flexible Buna-N flow-control orifice with no moving internal mechanical parts. As system pressure changes, the elastomeric orifice flexes to maintain a nearly constant flow rate within ±15% between 15 and 125 psi. The all-stainless-steel body construction provides excellent corrosion resistance and long service life in harsh environments.

CDH series – All stainless-steel body with NSF 61 approved Buna-N flow-control orifice. MNPT x MNPT threaded configuration (ANSI/ASME B1.20.1). Fully automatic constant-flow design with no moving internal components. 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)

Flow Rate: 45 GPM

Connection: 2-1/2" M × 2-1/2" M

Weight: 2.5 lbs

Operation: Flo-Trol® automatic flow control valves regulate system flow using a pressure-responsive Buna-N elastomeric orifice. As pressure rises or falls, the orifice adjusts its opening to maintain a stable flow rate without external controls or manual adjustment.

Construction: The Flomatic CDH valve body is manufactured from corrosion-resistant 304 stainless steel with a precision-molded Buna-N orifice for long-term performance. Laser-engraved markings provide quick, accurate identification of valve size and flow rating during installation and service.

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

Features & Benefits:

• High-capacity automatic constant-flow regulation
• No moving internal mechanical parts
• ±15% flow accuracy between 15–125 psi
• All 304 stainless-steel body construction
• NSF/ANSI 61 & 372 certified
• Buna-N elastomeric flow-control orifice
• Corrosion-resistant, durable design
• Laser-engraved size and flow information
• Maintenance-free operation under normal conditions

Applications:

• Large commercial and industrial water distribution systems
• Agricultural irrigation mains and branch lines
• Water treatment and filtration systems
• Process water and utility services
• General high-flow systems requiring regulated flow

* Refer to Flo-Trol® technical documentation for detailed flow tolerances and dimensional data.