Wenzhou EAA Electric · since 2008
Valve positioners that hold position when the valve fights back
Tight packing, viscous media, 60 metres of signal cable, a butterfly valve with the wrong characteristic — these are the reasons a control valve misses its setpoint. We build the electro-pneumatic positioners that fix them, in four installed patterns, and we build them under your brand when you ask.
What we make
Four positioner patterns, one factory
Most plants run more than one brand of positioner. Rather than asking you to standardise, we build to the patterns already bolted to your valves — and to the accessories that go around them.
YTC Type Valve Positioner
The YT-1000 family — linear YT-1000L and rotary YT-1000R — in every colour and accessory combination this factory builds, including the assembled positioner + PTM + limit switch stacks.
Rotork Type Valve Positioner
Positioners built to the Rotork YTC mounting and function pattern, including the new-generation module with automatic zero, span and friction detection.
NE700 Type Valve Positioner
Neles-pattern NE-series proportional positioners for cylinder or diaphragm actuators, rotary or linear, in vibrating service.
SMC Type Valve Positioner
IP8000 lever-type and IP8100 rotary-type electro-pneumatic positioners on the SMC pattern, interchangeable with the IP6#00 series.
Pneumatic Valve Actuator
Rack-and-pinion pneumatic actuators supplied on their own or as a complete assembly with positioner and switch box.
Limit Switch as Accessory
Five switch boxes — 210, 310, 410A, 410B and 510 — from plain indoor boxes to Exd II CT6 with IP67, PTM and solenoid valve options.
Pilot Valve as Accessory
Pilot valves for the positioner range — the air stage that sets dynamic response.
Selected models
Start from the valve you have to control
Linear or quarter-turn, hazardous area or not, with or without position feedback. Each page carries the published specification, not a sales summary.
IP8100 Electro Pneumatic Valve Positioner
SMC-pattern IP8100, rotary type with position output
Model 410B Limit Switch
Model 410B explosion-proof switch box with PTM and solenoid options
NE Series Electro Pneumatic Valve Positioner
NE700-series proportional E/P positioner, Neles pattern
Pneumatic Valve Actuator (Rack and Pinion)
Rack-and-pinion pneumatic valve actuator
YT1000L Valve Positioner — Rotork YTC New Module
Rotork-pattern YT-1000L, new-generation module
YT1000L Electro Pneumatic Valve Positioner
Linear-stroke E/P positioner, 4–20 mA in, 10–150 mm stroke
YT1000R Electro Pneumatic Valve Positioner-Black
Rotary E/P positioner, 0–90°, black finish
YT1000R+PTM(Internal) Electro Pneumatic Valve Positioner
Rotary positioner with internal position transmitter module
Where they go
The problem is rarely the positioner — it is the service
Oil, Gas and Refining
Control valves on hydrocarbon service are the classic case for a positioner: tight packing, high differential pressure and hazardous-area wiring rules.
Power Generation and Steam Systems
Steam headers combine high temperature, vibration and valves large enough that the actuator needs help holding position.
Chemical and Process Plants
Viscous, corrosive and solids-bearing media are where an unassisted actuator loses the valve position it was told to hold.
Water, Wastewater and Utilities
Utility duty is high valve count, modest budget and a strong preference for one positioner family across linear and quarter-turn valves.
OEM and private label
Your brand on the nameplate, your colour on the housing
Colour runs in black, blue and yellow, IP8000/IP8100 batches, NE724 batches and Rotork YTC new-module orders have all gone out of this factory. The gallery below is the record.
NE Series Valve Positioner OEM order
Production photographs of this OEM batch, taken on the assembly bench before packing.
YT1000L valve positioner OEM order in black color
YT1000L valve positioner OEM order in black color
YT1000 valve positioner OEM order in black color
YT1000 valve positioner OEM order in black color
IP8000 valve positioner OEM order
IP8000 valve positioner OEM order
Engineering notes
How a positioner actually works
Action Principle of Valve Positioner
(1) It is used in important adjustment systems that require high adjustment quality to improve the positioning accuracy and reliability of the adjustm…
Introduction of Valve Positioner
The valve positioner is divided into pneumatic valve positioner, electro pneumatic valve positioner and smart valve positioner according to the struct…
The Function of Valve Positioner
Adapted varieties Commonly used actuators are divided into pneumatic actuators and electric actuators, which can be divided into straight travel and a…
Send the nameplate photo. We answer with the model code.
Tell us the actuator, the stroke or turn, the signal and the area classification — we come back with the ordering code, the bracket kit and a price.