The Minimess®-Test Point 1604 is a screw Series with large internal diameter. It is well suited for applications where systems or containers must be filled or drained. It is available in free-cutting or high-grade steel with several metric and international connecting threads.
 Datasheet
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Minimess® Couplings – Series 1604 – compact test & service points up to 630 bar
Minimess® Series 1604 stands for compact, under-pressure connectable test and service ports with drip-free handling. As permanent points for measurement, venting and filling in hydraulics, pneumatics and HVAC/R, they enable fast diagnostics and condition monitoring on mobile and stationary systems.
Features (series-dependent): working pressure up to 630 bar, materials zinc–nickel plated steel or 316/316L stainless steel, seals NBR/FKM/EPDM/PTFE, integrated check/isolating element, dust cap, color coding, plus adapters to 7/16″-20 UNF (DN2/DN4 microbore hoses) and G 1/4 for gauges/transmitters.
ICS Schneider Messtechnik supports selection, adaption, hose assembly, calibration and configuration of complete service kits.
FAQ on Minimess® Series 1604
Answers on specifications, media, sealing, adapters, installation, tightness, safety and best practices.
What is Series 1604 best suited for?
As a compact test/service port for routine pressure checks, venting, filling and sampling—e.g., on power packs, mobile machinery, test rigs and HVAC/R circuits.
What pressure and temperature ranges are covered?
Typically up to 630 bar working pressure (depending on variant). Temperature usually −30…+100 °C, up to about +200 °C with FKM. Always consult the datasheet for exact limits.
Which media are compatible?
Hydraulic oils (mineral/synthetic), water–glycol, fuels, air/inert gases. For aggressive media choose stainless versions with PTFE seals.
Which sealing materials are available?
| Seal | Resistance | Typical use |
|---|---|---|
| NBR | Oils/diesel; −30…+100 °C | Hydraulic standard |
| FKM (Viton®) | Higher T, fuels/chemicals | High-temp/process |
| EPDM | Water/glycol, some steam | H2O/glycol circuits |
| PTFE | Very broad chemical, high T | Process/chemicals |
Which adapters and hoses can I use?
Adapters to 7/16″-20 UNF (for DN2/DN4 microbore hoses), G 1/4 (BSPP) and others. Hose options: DN2 up to 630 bar, DN4 up to 400 bar, plus PTFE-braided for chemical/high-temperature duties.
Can Series 1604 be coupled under pressure?
Yes—the couplings are designed for under-pressure coupling with very low spillage. Align axially and insert until the audible/tactile click confirms engagement.
How do I install correctly?
- Clean sealing faces; use the correct O-ring/face seal.
- Start the thread by hand, then tighten to the specified torque.
- For cylindrical BSPP/G adapters do not use tape on cone/face—sealing is via the O-ring/face.
How do I avoid leakage and contamination?
Use dust caps, keep coupler/plug clean, protect the sealing cone; remove dirt/moisture before coupling. Inspect O-rings regularly and replace as needed.
How do I connect gauges & transmitters?
Via adapters to 7/16″-20 UNF (hose) or G 1/4 for fixed gauges/pressure sensors. For continuous monitoring include check/isolating and pulse damping.
Are color coding and ready-made kits available?
Yes—color caps/rings for clear point identification (e.g., circuit A/B, low/high). Service cases with 1604 couplings, hoses, gauges and adapters are available.
How many reuses are feasible?
Metal components are reusable many times; replace O-rings when damaged or aged.
What should I consider for bleeding/sampling?
Variants with an integrated needle allow controlled venting/draining and oil sampling. Always use a suitable hose and catch container.
Safety notes
- Operate only with approved media and within the specified p/T limits.
- Wear PPE; consider pressure spikes.
- Leak-check before work; support/secure pressurized lines.
Common issues & quick fixes
- Seat leakage → inspect/replace O-ring, clean seat, verify torque.
- Hard to couple → check alignment, remove contamination, reduce Δp.
- Pressure drop → leak-check hose/adapter, inspect check valve.
Do you support selection & calibration?
Yes—we specify materials/seals, define adapters/hoses, provide factory/DAkkS calibrations for gauges/sensors and can add IIoT gateways on request.