Choosing a process control valve for a DN20 manifold system requires balancing flow capacity, actuator supply, and the physical package you can fit into your skid. The Sinclair Collins SC2000M Process Control Valve from Parker Hannifin brings a manifold-mount format, a position indicator, and a PTFE floating seat to that decision. But it also arrives as an open-box unit, which raises questions about condition and packaging. Here's what you need to know before you commit.
Quick Verdict
Listed at USD 159.95, the SC2000M is a 2-way, normally closed process control valve designed for steam, hot and cold liquids, air, and inert gas service. It features a 316L stainless steel body, a 303 stainless steel cylinder actuator, an anodized aluminum piston, and a floating PTFE seat. The valve is described as new and never used, though it comes without retail packaging and shows minor exterior wear from storage. If your application centers on DN20 manifold mounting with 1/2-inch ports, this valve is a credible option.
Who It Suits
This valve fits projects where you need a compact, manifold-mounted control point with a position indicator for visual status feedback. The temperature rating spans -40°F to 435°F (-40°C to 224°C), making it suitable for both hot and cold media lines. The 2-way normally closed design means the valve defaults to the closed position when actuator pressure is removed, which can be important for safety in flow control. The cylinder operator pressure range of 35-120 PSI gives you a clear target for your pilot air supply.
What Stands Out from the Listed Details
- Manifold mounting: The DN20 manifold mounting with 1/2-inch ports simplifies integration into a process skid without needing threaded pipe connections.
- Material package: The 316L stainless steel body, 303 stainless steel actuator, and anodized aluminum piston offer a corrosion-resistant assembly for industrial environments.
- Seat design: The floating PTFE seat material provides a closure that can handle a range of process media.
- Position indicator: A visual position indicator lets you see the valve state at a glance, which is useful during commissioning and troubleshooting.
- Dual bearing guided stem: This feature helps maintain alignment during operation, supporting smoother actuation over the valve's service life.
Meaningful Trade-Offs
The main trade-off is the open-box presentation. The valve is described as new with no retail packaging, and the exterior shows minor wear from storage, including several spots of light oxidization. If the component will go directly into a visible or clean-room setup, you'll want to inspect the photos closely. The valve also appears to be made of stainless steel and bronze according to the description, but the technical details list only stainless steel for the body and actuator, so there is some ambiguity about which parts are bronze. For most industrial uses, the open-box condition is a minor inconvenience rather than a functional issue, but it's worth factoring into your expectations.
Bottom Line
At USD 159.95, the Sinclair Collins SC2000M offers a specific combination of manifold mounting, normally closed operation, and material quality that suits many process control and automation projects. The open-box condition keeps the price accessible, but you'll need to accept cosmetic wear and missing retail packaging. If your system calls for a DN20 valve with a position indicator and a PTFE seat, this is a practical option to evaluate.
Sinclair Collins SC2000M Process Control Valve L234-1301, 350 PSI, DN20 2-Way
This unit is listed at USD 159.95 with a condition of new open-box, meaning it is described as never used but without factory packaging. The exterior may show light oxidization, so cosmetic appearance is the primary caveat. On the functional side, the valve includes a position indicator, a 2-way normally closed design, and a floating PTFE seat. The cylinder operator pressure range of 35-120 PSI defines the air supply you need to actuate it. The dual bearing guided stem adds durability, and the temperature range covers -40°F to 435°F. For a DN20 manifold system, this valve provides a clear, specification-backed starting point.
