Cover Accessories & Ports

Liquid Injection Valve Ports

Dose liquids under the cover through a pre-plumbed valve assembly.

Liquid injection ports let you add inoculant, chemicals, makeup water, or other liquids beneath a sealed cover in a controlled way. Each assembly is built on an HDPE base plate that bonds to the cover, with a manual ball valve for shutoff and a check valve to prevent backflow out of the sealed volume. Unions are included so the valve train can be serviced without cutting into the line.

The whole assembly is fabricated and pressure-conscious at the EFI shop, then shipped ready to weld in. Line size and the valve package are selected to match your dosing rate and the liquid being introduced.

Configure & Request Quote

Build your part

Line Size

Valve Package

Trim

Quantity

Made to order. No online payment. We reply with pricing and lead time.

Specifications

Build & materials

Base & body	HDPE, extrusion-welded
Valves	Manual ball valve, check valve
Serviceability	Union connections for maintenance
Sizing	Line size made to order

Where It's Used

Common applications

Digester inoculant or nutrient dosing
Chemical and additive injection under a cover
Makeup water or recirculation return
Any controlled liquid introduction below a sealed cover

These parts mount on EFI floating covers and gas-tight digester covers, and are fabricated at the EFI shop in Gaston, SC.

FAQ

Questions about this part

The check valve prevents liquid or gas from flowing back out of the sealed volume through the injection line. On a gas-tight cover this protects both the seal and the operator, so the ball valve handles shutoff while the check valve handles backflow.

Yes. Order the ball valve alone, ball valve with check valve, or a full train with unions for in-place service. Line size and trim are selected to suit the liquid and dosing rate.

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