Product Description
Introduction This valve is used for switching control of pneumatic circuits. Available in two types shown below, it is designed to
provide various control circuits as desired through combination.
In using these valves, it is suggested that this manual be carefully read for proper and adequate knowledge of operation and
maintenance so as enable the valves to per from as they should..
KOSO PRF300 PRF400 Pressure Reducing Valve For Regulating Instrument Air
Specification
Series
PFR
Model
PFR300 PFR400
Input signal
4～20mA analog signal or digit signal
Input impedance
250 ± 5% at 25℃
Characteristic
Linear
Brand Name
KOSO
Pilot valve
avaNon-bleeding type/Single acting and double acting types are available
Air supply
Output air pressure 50%
Single acting type : 5Nl / min at 140 Kpa air supply
Double acting type : 15Nl / min at 400 Kpa air supply
Max. capacity
Capacity when output is atmospheric venting.
Single acting type : 175Nl / min at 140 Kpa air supply
Double acting type :400Nl / min at 400 Kpa air supply
Performance
For single acting actuator
Linearity 1.0% of Full stroke
Hysteresis 0.5% of Full stroke
Response level 0.1% of Full stroke
Repeatability 0.2% of Full stroke
Supply pressure effect 0.1%/10 Kpa
For double acting actuator
Linearity 1.5% of Full stroke
Hysteresis 0.8% of Full stroke
Response level 0.2% of Full stroke
Repeatability 0.3% of Full stroke
Supply pressure effect 0.4%/50 Kpa
KOSO
The above represents the performance of the positioner on an actuator without a valve.For the performance of the
complete unit with a valve and an actuator, see KOSO STANDARD SPECIFICATION.
Air connection
Rc 1/4
Wiring connection
G 1/2
Ambient temperature
Standard type 20 80
High temperature service (option) 0 100
Low temperature service (option) 50 60
Ambient humidity range
10 90% RH
Enclosure
Weather proof type ( IP65 )
Explosion proof type ( Ex md CT6 )
01171
Intrinsically safe explosion
proof type ( Exia CT6 )
01172
Standard anicillary
Auto-Manual change
FEATURES USABLE WITH LOW TO HIGH CAPACITY ACTUATORS By adjusting the built-in capacity control spring, the positioner can be made
optimum to the given actuator. A LOW AIR CONSUMPTION The pilot valve is low in air consumption and high in capacity. OUTPUT CHARACTERISTICS SELECTABLE Having a cam within the feedback construction, choices other than the standard linear characteristic are available. COMPATIBLE WITH VARIOUS FEEDBACK TYPES Applicable to the following types by simply exchanging the cam block. * For
Linear type actuator : Feedback for Standard lever type EP 8 1 * For Rotary type actuator : Feedback for lever type EP 8 2 * For
Rotary type actuator : Feedback for direct connection to driving shaft EP 8 4 REVERSE ACTION PILOT VALVE EASILY AVAILABLE The positioner for double acting actuators can be used as a reverse action pilot valve when combined with a spring return actuator that requires a reverse action pilot. ANTI-PRESSURE AND EXPLOSION PROOF STRUCTURE MARKING ON-SITE ADJUSTMENT POSSIBLE The anti-pressure and explosion proof construction, with the terminal and coil blocks enclosed together in one package, makes it possible to remove the positioner cover for inside inspection or span adjustment even in an explosive ambient. INTRINSICALLY SAFE
CONSTRUCTION FOR A WIDE SCOPE OF APPLICATIONS The intrinsically safe construction (torque-coil type: EP82) cover terminals and coil as one package. This, combined with The adoption of the specified zener barrier, makes the unit applicable in all hazardous gas location ( including Class 0 area) ranging from low ( 40 ) to high ( 60 ) temperature environment.
Company Profile
KOSO PRF300 PRF400 Pressure Reducing Valve For Regulating Instrument AirKOSO PRF300 PRF400 Pressure Reducing Valve For Regulating Instrument Air
Xiangjing (Shanghai) Electromechanical Technology Co., Ltd. is mainly engaged in the technical development, technical consultation, technical service, installation and commissioning services of marine engineering, oil and gas, petrochemical, water conservancy and hydropower, thermal power generation and other mechanical and electrical equipment products; Well-known brand fluid control valves; instrumentation; hydraulic pipe fittings; bearings; seals; industrial automation and other high-tech enterprises. With our dedicated service, our customers' work is made easy and efficient. As a comprehensive supplier of electromechanical products, Xiangjing (Shanghai) Technology Co., Ltd. adheres to the modern market concept of customer-centered, relying on the rich product resources of the Doctoral Group and the industry e-commerce platform and the centralized professional service team to pass professional orders. Procurement, specialized inventory and distribution management and specialized technical support to achieve accurate and timely delivery services, localized services and quick and timely response, maximizing customer value, effectively shortening your spare parts supply cycle and effectively reducing inventory Effectively improve the efficiency of your work, thus effectively improving the overall competitiveness of the company.
FAQ
1. who are we?
We are based in Shanghai, China, start from 2015,sell to South America(40.00%),Southeast Asia(30.00%),Eastern Europe(20.00%),Western Europe(5.00%),Domestic Market(5.00%). There are total about 11-50 people in our office.

2. how can we guarantee quality?
Always a pre-production sample before mass production;
Always final Inspection before shipment;

3.what can you buy from us?
Valve,Valve Accessories

4. why should you buy from us not from other suppliers?
Xiangjing (Shanghai) Electromechanical Technology Co., Ltd. is mainly engaged in the technical development, technical consultation, technical service, installation and commissioning services of marine engineering, oil and gas, petrochemical, water conserva

5. what services can we provide?
Accepted Delivery Terms: FOB,CIF,EXW,Express Delivery；
Accepted Payment Currency:USD,EUR;
Accepted Payment Type: T/T,L/C,Credit Card,Western Union,Cash;
Language Spoken:English,Chinese
KOSO PRF300 PRF400 Pressure Reducing Valve For Regulating Instrument Air
KOSO PRF300 PRF400 Pressure Reducing Valve For Regulating Instrument Air
KOSO PRF300 PRF400 Pressure Reducing Valve For Regulating Instrument Air
KOSO PRF300 PRF400 Pressure Reducing Valve For Regulating Instrument Air
KOSO PRF300 PRF400 Pressure Reducing Valve For Regulating Instrument Air
KOSO PRF300 PRF400 Pressure Reducing Valve For Regulating Instrument Air
KOSO PRF300 PRF400 Pressure Reducing Valve For Regulating Instrument Air
KOSO PRF300 PRF400 Pressure Reducing Valve For Regulating Instrument Air
KOSO PRF300 PRF400 Pressure Reducing Valve For Regulating Instrument Air