Pneumatic Positioner
YT-1200 Series
USER'S MANUAL
YTC Ver 1.01
Introduction
Thank you for choosing YTC product. Each product is fully inspected after the production to
offer you the highest quality. In order to fully utilize the product, we strongly recommend users
to read this manual carefully and understood.
The manual should be given to the end-user.
The manual can be changed or revised without any prior notice. Any changes in
product’s specification, structure, and/or any components may not result immediate
revised version of the manual.
The manual should not be duplicated or reproduced for any purpose without any
approvals from Young Tech Co., Ltd, South Korea / YTC.
Manufacturer Warranty
For the safety, it is imperative to follow instructions in the manual. It is not manufacturer's
liability for any damages which caused by users' negligence.
It is not manufacturer's liability for any damages or accidents which resulted by any alteration
or modification of the product and parts. If alteration or modification is necessary, please
contact the manufacturer directly.
Manufacturer warrants the product from the date of ori ginal retail purchase of the product for
one (1) year, except as otherwise stated.
Manufacturer warranty will not cover the products that the product h ave been subjected to
abuse, accident, alteration, modification, tampering, negligence, misuse, faulty installation,
lack of reasonable care, repair or service in any way that is not contemplated in the
documentation for the product, or if the model or serial number has been altered, tampered
with, defaced or removed; damages that occurs in shipment, due to act of God, failure due to
power surge, and cosmetic damage. Improper or incorrectly performed maintenance or
report voids this Limited Warranty.
For detailed warranty information, please conta ct the corre sp onding local Young Tech Co.,
Ltd office or main office in South Korea.
Product Description
Main Features and Functions
The product can operate normally in very extreme environment, such as vibration and
temperature.
The durability has been proven after testing 2 million cycles at the minimum.
Response time is very short and accurate.
Simple part change can set 1/2 Split Range.
It is economical due to less air-consumption.
Direct / Reverse action can be set easily.
Zero & Span adjustment processes are simple.
Feedback connection is easy.
Operation Logic
Bellows(①) push flapper(②) if input pressure increases. Then the gap between nozzle(③) and
flapper(②) increases, which results pressure in upper spool(⑤) exhaustion. This would cause
spool(⑤) to rise upward. As the spool(⑤) rises, it pushes format(⑧), and the air pressure will be
supplied to the actuator(⑩). As the actuator's inner pressure increases, the actuator stem(⑫) will
move. For graphical diagram, please refer to <Figure 1>.
Label Description
Model: Indicates model name and any options (if any)
Input Signal: Indicates current input signal range.
Supply Pressure: Indicates the range of supply pressure.
Serial Number: Indicates unique serial number.
Suffix Symbol
YT-1200 series follows suffix symbols as below.
Specification
Parts and Assembly
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