Our 300 Series Ball Valves are built for dependable quarter-turn isolation across process and instrumentation lines operating within their designated pressure class. Like every valve in our ball valve range, the core mechanism is a precision-machined ball with a bored-through passage that rotates 90 degrees between fully open and fully closed. What defines the 300 Series specifically is the combination of pressure rating, material construction, and sealing arrangement engineered to hold up reliably within its intended service range no more, no less.
Every valve in this series goes through the same manufacturing discipline as the rest of our range: machined to tight tolerance, assembled with care, and individually pressure-tested before dispatch.
The 300 Series operates on the same fundamental ball valve mechanism a spherical ball with a through-bore sits between two seats inside the valve body. When the handle is aligned with the flow direction, the bore matches the pipe axis and media flows through with minimal obstruction. A 90-degree turn rotates the ball so its solid surface blocks the passage, and the seats compress against the ball to create a tight seal.
What makes this series specifically suited to its rated applications comes down to the seat material and ball surface finish selected for it, which are matched to hold sealing integrity consistently within its designated pressure and temperature range, cycle after cycle.
300 Series
Quarter-turn rotating ball with bored-through passage
Machined from selected material grades suited to instrumentation and process service
Individually pressure-tested before dispatch
Manufactured under ISO 9001:2015 certified processes
Exact pressure and temperature ratings for the 300 Series depend on the material grade specified our team can confirm figures against your project's operating conditions.
Specifying a valve rated well beyond what a line actually needs isn't caution, it's usually just added cost without added benefit. The 300 Series exists for applications that fall within a defined, moderate pressure range, and we manufacture it to perform reliably and consistently within exactly that range not stretched beyond its intended service, and not under-built for it either. Every unit carries the same material traceability and individual pressure testing we apply across our full valve range, so you're getting a valve engineered specifically for its job, not a generic component with a series number attached.
If you're not fully certain the 300 Series is the right fit for your line's pressure conditions, it's worth confirming with our engineering team before ordering matching the series to the actual application avoids both overspending and underperformance.
The 300 Series is built for a defined, moderate pressure range our team can confirm exact ratings based on your line's specific operating conditions.