Flomatic 3383PI 745PI 4" Position Indicator Swing Check Valve

The Flomatic 3383PI 745PI 4" position indicator swing check valve is a 45° seat Flo-Flex® swing check valve designed to help prevent backflow in water system applications where visual confirmation of valve position is needed. This model features an epoxy-coated ductile iron body with a Buna-N coated disc and stainless-steel cover fasteners for dependable service in demanding pump and pipeline environments.

Specifications:

Standard: AWWA C508

Flange Rating: ASME Class 150

Max Pressure: 250 PSI

Max Temperature: 140°F (60°C)

Connection: 4" Flanged, ASME 150#

Weight: 68 lbs

Operation: The Flo-Flex® 45° seat design promotes smooth opening under forward flow and controlled closing as flow decelerates, helping reduce reverse flow and hydraulic shock. The external position indicator provides a clear visual reference of valve status during operation and maintenance checks.

Construction: An epoxy-coated ductile iron body and cover provide strength and corrosion protection, while the Buna-N coated disc offers resilient sealing for water service. Stainless-steel cover fasteners support long-term durability in wet environments. The position indicator assembly is designed for straightforward visual monitoring without disassembly.

Applications: Pump stations, water distribution, irrigation, industrial and municipal piping systems, and long pipeline runs where dependable backflow protection and valve-position visibility are beneficial.

Flomatic Quality: Flomatic is known for engineered valves built for reliability and long service life. Each valve is designed with performance-focused materials and proven designs used in water system applications worldwide.