ITT Pure-Flo 903 cast-iron manual bonnet.
The 903 is a handwheel-operated Pure-Flo bonnet with cast-iron external construction. It provides manual opening and closing for compatible valve sizes and is intended for installations where the external environment and cleaning protocol do not require an all-stainless topworks.
What ITT Pure-Flo 903 cast-iron manual bonnet is—and where it fits.
The 903 is a handwheel-operated Pure-Flo bonnet with cast-iron external construction. It provides manual opening and closing for compatible valve sizes and is intended for installations where the external environment and cleaning protocol do not require an all-stainless topworks.
Where it fits
Use it for straightforward manual service only after confirming valve size, diaphragm, washdown exposure, corrosion conditions, temperature, operator access, travel-stop needs, and whether a sealed bonnet or stainless alternative is required.
What to confirm
Confirm the compatible valve body and size, diaphragm and compressor connection, pressure and temperature, washdown or autoclave conditions, sealed-bonnet or travel-stop options, and operator access.
How Triplex helps
Triplex helps keep the actuator conversation tied to the complete valve package so the hardware works in the plant, not just on a datasheet.
What Triplex will want to know.
Good valve recommendations come from process context. A few details up front prevent a lot of expensive back-and-forth later.
| Selection point | Why it matters | Triplex note |
|---|---|---|
| Manual or automated operation | Manual bonnets, pneumatic actuators, and stainless actuator options solve different plant realities. | Confirm who operates the valve and how often it cycles. |
| Fail position and force | Actuator sizing depends on valve size, diaphragm, process pressure, and fail-open/fail-closed expectations. | Do not size the actuator from the actuator name alone. |
| Controls and environment | Feedback, solenoids, washdown exposure, and service access can determine the best topworks package. | Triplex can help coordinate actuator, switch package, and documentation needs. |
Manufacturer literature and related Triplex resources.
Use these documents as a starting point, then confirm final selection against the actual process conditions.
Keep the selection connected to the full ITT valve platform.
Actuation overview
Compare this item against related ITT options before narrowing the valve package.
PlatformPure-Flo diaphragm valves
Review the full Pure-Flo platform around body, diaphragm, bonnet, actuator, and controls decisions.
PlatformEnviZion platform
Use the EnviZion family page when the valve package belongs in that platform conversation.
Need help applying 903 Cast Iron Manual?
Send the valve size, connection style, product, process conditions, cleaning/sterilization method, actuation preference, controls needs, and any documentation requirements.
Talk to Triplex
