Marine Cast Iron Flanged Gate Valve (CB/T465-1995)
CB/T 465-1995
DN175-300；350-500 0.6 / 0.4 / 0.25 MPa
Full-open isolation valves for low-pressure-loss shipboard lines. Select by standard, DN, pressure rating, body material and flange dimension.
This category covers flanged gate-valve series in cast iron, cast steel, bronze, ductile iron and JIS-listed materials. Each inquiry is checked for isolation duty, face-to-face dimension, flange drilling, material and certificate scope before quotation.
Before RFQ, confirm standard scope, flange dimensions, certificate requirements, and isolation-function boundaries.
Gate valves are normally used for full-open isolation. Throttling service should be reviewed with the valve standard, seat design, media, velocity and warranty boundary before selection.
Confirm the governing standard, DN size, pressure class, body and seat materials, flange drilling and facing, face-to-face dimension, service conditions, certificate scope, quantity and delivery requirement.
No. Substitution or equivalent-model claims require comparison of standard scope, size, pressure-temperature basis, material, flange details, test requirements and certificate scope.
Start with the governing standard and service conditions, then compare pressure-temperature limits, corrosion resistance, seat and seal materials, flow media, maintenance expectations and certificate scope. Material grades are not substituted by appearance or name.
A gate valve should not replace another valve type when the line requires throttling, regulated flow control, or prevention of reverse flow. Changing valve function affects pressure drop, flow direction, sealing, installation, testing and certificate scope, so project or engineering approval is required.