The Rotork YT-3100 is described by Rotork as a reliable and precise smart positioner for linear and quarter-turn rotary actuators, available in both single-acting and double-acting layouts. It uses a 4–20 mA input signal to control pneumatic output, and is designed to reduce the practical pain points of real plants: inconsistent valve response, slow commissioning, and troubleshooting that depends too much on experience rather than evidence.
Your requested model, YT-3100RDN0111S, is best understood by decoding the order code and then mapping the selection to the YT-3100 platform specifications.
1) Decoding the order code: YT-3100RDN0111S
Rotork publishes a product code structure for the YT-3100 series (Model → Motion type → Acting type → Explosion protection → Lever type → Conduit & air connection → Gauges block → Options → Operating temperature).
| Segment | In your model | Catalog meaning | Practical meaning |
|---|---|---|---|
| Model | YT-3100 | Aluminium housing + polycarbonate cover | Compact industrial enclosure |
| Motion type | R | Rotary | Quarter-turn actuator applications |
| Acting type | D | Double | Double-acting pneumatic control (two outputs) |
| Explosion protection | N | Safe area | Standard non-hazardous installation |
| Lever type | 0 | Note below | Mounting/travel definition |
| Conduit & air connection | 1 | G 1/2 conduit + Rc 1/4 air | BSP/Rc pneumatic standard |
| Gauges block | 1 | Gauges block included | Local pressure indication for service |
| Options | 1 | PTM 4–20 mA feedback | Position feedback output for monitoring |
| Operating temperature | S | −30 to +85 °C | Wide ambient range |
Important clarification (straight talk): In Rotork’s published table, rotary lever type is listed as “5 = NAMUR”, while “0/1/2” are shown under linear stroke ranges. Because your code includes “…N0…”, it may be (a) a transcription error, or (b) a seller-specific shorthand where the lever digit is not written in the same way as the catalog example. The safe move is simple: verify the exact nameplate order code and the mounting kit (NAMUR vs linkage) before you lock in brackets and spares. The rest of the configuration (R, D, N, connection, gauges, feedback, temperature) matches the catalog structure cleanly.
2) Published YT-3100 specifications (platform snapshot)
The YT-3100 series datasheet lists the following key specifications.
| Parameter | Specification |
|---|---|
| Input signal | 4 to 20 mA DC |
| Supply pressure | 0.14 to 0.7 MPa (1.4 to 7 bar / 20 to 102 psi) |
| Rotary stroke range | 55 to 110° |
| Impedance | Max. 500 Ω @ 20 mA DC |
| Conduit | G 1/2 |
| Air connection | Rc 1/4 or 1/4 NPT (your code selects Rc 1/4 via “1”) |
| Gauge connection | 1/8 NPT / Rc 1/8 (listed as 1/8 NPT on rotary drawing) |
| Performance | Linearity ±0.5% F.S.; Hysteresis ±0.5% F.S.; Sensitivity ±0.2% F.S.; Repeatability ±0.3% F.S. |
| Air consumption / flow capacity | Below 2 LPM at 0.14 MPa; Flow capacity 70 LPM at 0.14 MPa |
| Output characteristics | Linear, EQ%, Quick Open, User set (5, 21 points) |
| Ingress protection | IP66 |
| Weight | 1.7 kg (3.7 lb) |
| Operating temperature | −30 to +85 °C (−22 to +185 °F) |
If you care about control quality, the performance line matters most: hysteresis and repeatability are the boundaries of how “smooth” the valve can be when modulating around a setpoint, especially on quarter-turn valves where torque changes sharply near closed/open positions.
3) What makes it “smart” in practical terms
Rotork highlights the YT-3100’s commissioning-friendly design: compact construction, optional gauge manifold concept, a menu with four push buttons, NE107-rated visual self-diagnostics, position feedback capability, and a non-contact sensor approach for higher-cycle service.
| Design feature | Why it matters on site |
|---|---|
| Smart management menu (four push buttons) | Faster setup without specialized tools |
| Visual self-diagnostics (NE107) | Troubleshooting becomes structured, not guess-based |
| PTM 4–20 mA feedback option | Lets you trend “command vs actual position” in PLC/DCS |
| Non-contact sensor concept | Intended for improved stability in high-frequency valve operation |
| Double-acting layout | Better authority controlling motion in both directions |
Because YT-3100RDN0111S includes the PTM 4–20 mA feedback (option “1”), it supports a more modern maintenance style: you can alarm on abnormal deviation, identify growing friction, or validate whether a valve is truly reaching its commanded position—without sending someone into the field for every suspicion.
4) Application fit: where YT-3100RDN0111S is a strong match
With rotary (R) plus double-acting (D) plus safe area (N), this configuration is typically chosen when you want firm pneumatic control in both directions and you are not constrained by hazardous-area approvals at that valve station.
| Typical scenario | Why this configuration works |
|---|---|
| Modulating control of ball/butterfly valves | Rotary positioning supports quarter-turn geometry |
| High torque variation applications | Double-acting authority helps stabilize response |
| Plants standardized on BSP/Rc air fittings | Connection “1” selects Rc 1/4 air |
| Skids that value fast commissioning | Gauges block improves setup and diagnostics speed |
| Programs that require monitoring | PTM 4–20 mA feedback supports trending and verification |
5) Installation and commissioning checklist (rotary, double-acting)
A smart positioner cannot “outsmart” bad air, wrong mounting, or misrouted tubing. These checks prevent most field problems:
Summary
Rotork YT-3100RDN0111S is a YT-3100 series smart rotary positioner configured for double-acting control in a safe-area installation, with G 1/2 conduit, Rc 1/4 pneumatic ports, a gauges block, PTM 4–20 mA position feedback, and a −30 to +85 °C operating range. The YT-3100 platform is built around commissioning efficiency (push-button menu) and maintenance clarity (NE107 diagnostics + feedback), while providing published performance and pneumatic capacity suitable for demanding quarter-turn control loops.
The one item worth double-checking is the lever digit (“0”) in a rotary code, since Rotork’s table lists rotary lever type as NAMUR (5)—so confirming the nameplate code and mounting kit before purchase/installation will save time and avoid fitment surprises.
