Every valve in a process plant exists in a context. It is surrounded by instrumentation: pressure gauges, temperature sensors, drain lines, vent connections, sample points, chemical injection ports. In conventional piping systems, each of these functions requires its own tapping, its own fitting, its own potential leak point. The result is a tangle of small-bore connections clustered around each valve — adding weight, complexity, and maintenance burden to what should be a simple flow control device.
The MODU Multi-Purpose Port takes a different approach. It is a single, standardised 1/4" NPT port integrated directly into every MODU ONE valve body, designed to serve multiple instrumentation and utility functions from one access point.
What the Multi-Purpose Port Does
The port is machined into the valve body during manufacturing — it is not an aftermarket addition or a bolt-on accessory. Its position on the valve body is consistent across all MODU ONE models, which means piping designers can specify instrumentation connections with certainty, regardless of which valve type occupies a given position in the line.
A single Multi-Purpose Port can be used for any of the following functions:
- Drain — gravity drainage of the valve cavity for maintenance or winterisation
- Vent — releasing trapped air or gas during system filling and commissioning
- Sample point — extracting process fluid samples for quality testing without opening the line
- Chemical injection — introducing inhibitors, biocides, or other treatment chemicals directly at the valve location
- Pressure measurement — connecting pressure gauges or transmitters for local or remote monitoring
- Temperature measurement — inserting thermowells or direct-mount temperature sensors
The port accepts standard 1/4" NPT fittings, which means it works with off-the-shelf instrumentation from any manufacturer. No proprietary adapters, no custom fittings.
Why This Matters for Piping Design
In a conventional system, adding a drain connection to a ball valve means welding a boss onto the adjacent pipe, or specifying a valve with a custom-drilled body port. Adding a pressure gauge means a separate tapping. Adding a sample point means another. Each addition requires engineering time to specify, procurement time to source, and installation time to weld, thread, and test.
With the Multi-Purpose Port, these functions are already available on the valve body. The piping designer specifies the valve, and the instrumentation connection is included by default. If the function is not needed, the port ships with a standard plug. If the requirement changes later — say a drain point needs to become a sample point — the change is a fitting swap, not a piping modification.
This has a measurable impact on isometric drawing complexity. Fewer branch connections around each valve means cleaner drawings, fewer potential clash points in 3D models, and less field rework during construction.
Reducing Leak Points
Every threaded or welded connection in a piping system is a potential leak point. In a typical valve installation with separate drain, vent, and gauge connections, there might be three to five additional small-bore fittings within a short radius of the valve. Each one must be correctly installed, torqued, and tested.
The Multi-Purpose Port consolidates these into one connection point. Fewer fittings mean fewer potential leaks, less testing time during commissioning, and a lower probability of fugitive emissions — a concern that grows more pressing as environmental regulations tighten globally.
Consistency Across the Ecosystem
One of the less obvious but important benefits of the Multi-Purpose Port is its consistency. The port location, thread specification, and cavity geometry are identical across all MODU ONE valve types — A10 Ball Valve, B10 Check Valve, C10 Control Valve, D10 Strainer, E10 Sight Glass, and F10 T-Strainer.
This means that if a piping system is designed with a drain connection on an A10 Ball Valve, and that valve is later swapped for a B10 Check Valve (a change that requires no piping modification thanks to identical face-to-face dimensions), the drain connection remains in the same position. The instrumentation does not need to be moved, re-routed, or re-specified.
This kind of cross-compatibility is only possible because the Multi-Purpose Port was designed as part of the MODU ONE ecosystem from the beginning, not added retrospectively to individual valve models.
Practical Applications
Chemical Processing
In chemical plants, sample points are required at multiple locations for quality control. The Multi-Purpose Port provides built-in sample access at every valve location without additional piping work.
HVAC and District Energy
Drain and vent functions are essential for system commissioning and seasonal maintenance. The integrated port eliminates the need for separate drain valves and air release points adjacent to each valve.
Offshore and Marine
Where weight and space are constrained, consolidating multiple small-bore connections into a single port per valve reduces both the physical footprint and the number of components exposed to corrosive environments.
The Multi-Purpose Port is standard on all MODU ONE valves. No upcharge, no special order. Technical specifications and connection details are available through MODU Cloud.