Koso EPA-814 4-20mA. DC 0.14~0.7MPa Valve Electro Pneumatic Positioner

• Customization: Available
• Brand: Koso
• Power: Electro-Pneumatic
• Model NO.: EPA814
• Adjusted Form: Switching Type
• Working Type: Linear / Rotary
• Pressure: Medium Pressure
• Work Temperature: Normal Temperature
• Acting Type: Single Acting/Double Acting
• Material: Aluminum
• Customized: Customized
• Structure: Rack and Pinion
• Item Name: Koso EPA814 Valve Positioner
• Model: EPA814
• Brand Name: Koso
• MOQ: 1PC
• Warranty: 1 Year
• Input Signal / Characteriatic: 4 to 20, 4 to 12, 12 to 20 Ma DC / Linear
• Air Supply: 140 to 700 Kpa
• Linearity: +/-1.0% / 0.5%
• Hysteresis: +/-1.5% / 0.8%
• Air Consumption: Output Air Pressure(50%) 5 Nl/Min. at Sup.
• Max. Capacity: Output Atomosphere 175 Nl/Min. at Sup. 140 Kpa
• Enclosure: Weather Proof, Explosion Proof, Intrisically Safe
• Air/Electric Wiring Connection: RC. 1/4 / G1/2
• Environment Temp: -20 to +80°
• Size: 30/19/24
• Transport Package: Carton Boxes
• Specification: 30/19/24cm
• Trademark: Koso
• Origin: Japan
• HS Code: 9026900000
• Production Capacity: 1000/Month
• Package Size: 30.00cm * 19.00cm * 24.00cm
• Package Gross Weight: 3.050kg

Product Description

Product Description

Koso Electropneumatic Valve Positioner EPA814

The KOSO EPA814 is an electro-pneumatic positioner designed for single-acting angular travel actuators. It is an important accessory for pneumatic actuators (pneumatic control valves). The input signal is typically 4 - 20 mADC (standard), and it can also support split-range signals like 4 - 12 mADC / 12 - 20 mADC. It converts the electrical input signal into an air pressure output to control the movement of the actuator. Meanwhile, it feedbacks according to the stroke of the actuator to ensure that the actuator's stroke is accurately positioned according to the control signal.

Benefits

Accurate Control: Converts electrical signals to pneumatic signals precisely and feedbacks based on actuator stroke, ensuring accurate valve positioning. This helps to improve the control accuracy of the valve, making the valve's opening degree accurately correspond to the control signal, and is beneficial for maintaining stable process parameters in industrial production.
Adaptability to Different Processes: The adjustable output characteristics and split-range function enable it to adapt to various process control requirements, such as different flow characteristics needed in different production stages or different control requirements for multiple valves in a system.
Stable Operation: The stable performance design, such as the multi-loop force balance and reliable components, reduces the occurrence of oscillations and failures, ensuring the stable operation of the valve and the entire production process, reducing maintenance costs and production interruptions caused by equipment failures

Features

Input Signal Compatibility: Accepts a standard 4 - 20 mADC input signal, and also supports split-range operation for more flexible control scenarios.
Output Characteristic Adjustability: The output characteristic can be linear by default, and it can be changed to Quick Open or Equal Percentage via cam adjustment, meeting different process control requirements.
Good Compatibility and Interchangeability: Has good compatibility and universal interchangeability, suitable for a wide range of applications.
Stable Performance: With large pneumatic power and fast action speed. The force balance adopts a multi-loop design, which is not easy to oscillate and has quite stable action performance.
Reversible Action: The positive and negative action modes of the positioner can be easily adjusted and calibrated.
Compact and Reliable Structure: The components are precisely die-cast, with a sophisticated manufacturing process for the appearance and internal structure. The overall structure is compact. It uses stainless steel fasteners and a spraying process, having good anti-corrosion performance.
Convenient Adjustment and Installation: The range and zero adjustment knobs are of handwheel type, convenient for adjustment and equipped with a locking device. It is equipped with installation plates and accessories suitable for various types of actuators, making installation and adjustment easy. There are also installation screw holes at the bottom of the positioner and optional transition connection installation plates, which can be conveniently installed on various pneumatic actuators.
Optional Damping Mechanism: Can be equipped with an adjustable damping mechanism as required, so that it has the characteristic of adjustable output flow

Application

Petroleum Industry: Used in processes such as oil refining, oil transportation, and chemical production in refineries, to control the flow, pressure, and temperature of various media by accurately positioning valves, ensuring the stable operation of the production process and product quality.
Chemical Industry: In chemical plants, it is applied to control valves in different chemical reaction processes, distillation processes, and fluid transportation systems, helping to accurately control the addition of raw materials, the flow of reactants and products, and maintain the stability of chemical reactions and process conditions.
Power Generation Industry: Such as in thermal power plants, it is used to control valves in systems such as steam supply, water supply, and fuel supply, ensuring the stable operation of the power generation equipment and the efficient conversion of energy.
.

Specification

Model	EPA814
Type	Electro-pneumatic positioner (single acting, angular travel type)
Input Signal	- Standard: 4–20 mADC - Split-range: 4–12 mADC / 12–20 mADC
Input Impedance	250 ohms (for 4–20 mADC input)
Output Signal (Air Pressure)	- Usual range: 0.14–0.16 MPa - Optional range: 0.17–0.50 MPa
Rated Angular Travel	0–90°
Air Supply Pressure	0.14–0.16 MPa, 0.17–0.50 MPa
Air Consumption	Not specified (data not found, usually similar models have values like 5 NL/min at certain supply pressure, for reference only)
Hysteresis	Not specified (data not found, similar models may have ≤1% of full travel, for reference only)
Dead Band	Not specified (data not found, similar models may have ≤0.4% of full travel, for reference only)
Output Characteristics	Linear (can be changed to Quick Open or Equal Percentage via cam adjustment)
Explosion-Proof Rating	Not specified (data not found, but may be available as an option depending on model variant and certification)
Operating Temperature	Not specified (data not found, similar models may have ranges like -20°C to +60°C for explosion-proof type and -40°C to +80°C for standard type, for reference only)
Relative Humidity	≤90% (non-condensing)
Air Supply Connection	ZG1/4
Housing Material	Aluminum alloy
Weight	3.5 kg
Mounting	Suitable for direct mount on pneumatic actuators (usually compliant with ISO 5211 standard for angular travel actuators, not explicitly stated for this model but common for such types)
Input Signal Compatibility for Special Versions	10 - 50 mADC (for some special versions like EP-15.17, EP-25.27 with input impedance 100 ohms for this range, but not clear if directly applicable to EPA814 standard model without further clarification)

Packing & Delivery

Packing:Original Carton boxes

Packaging: Original cardboard box or Wodeen packaging by Express(DHL/UPS/Fedex/Aramex/EMS/SF)

Company Profile

Company 

KeRui (weifang) Automation Equipment Co., Ltd. specializes in industrial automation instrument development, production and sales,technical services, and supporting equipment supply of specialized companies. The main products are flow meters, level meters,temperature meters, pressure meters, electrical meters, thermal intelligent meters, programmable controllers (PLC), DCS distributed control systems, and eight series of more than 1,000 specifications. Its products and technologies are widely used in electric power, metallurgy, petrochemicals, environmental protection, plastics, food, printing, tobacco, textile, dyeing, and other fields.

We can offer Rosemount, Emerson,Endress+Hauser, ABBb, Yokogawa, Siemens, Fisher,Koso, Samson, Abzil, Neles, Flowserver,UE, Masoneilon etc, Brands. If you need anything please feel free to contact me.

Below are our core competitive advantages:

1. Advanced Technology & Precision Engineering

2. Robust Quality Control & Certifications

3. Customization & Versatility

4. Innovation & R&D Excellence

5. Efficient Production & Global Service

6. Sustainable & User-Centric Design

FAQ

FAQ

Q: How long will you give me the reply?

A: We will reply to you as soon as we see the information.

Q: What is the delivery time?

A: Our delivery time is within 3-7 days after we get your payment; 

for large qty mass orders, the time should be confirmed again for you.

Q: How about your package?

A: Do not worry about the package, we have rich experience in packing, and all our package is wooden case package.

Q: How about the payment terms?

A: You can choose T/T.

Q: Do you provide samples?

A: Yes, we have materials in stock to help you to get the samples as soon as we can.

Q: What is the MOQ?

A:1PC.

Q: Can I get a lower price if I order large quantities?

A: Yes, cheaper prices with more bigger size orders.

Q:Who we are
A: We focus on the instrument and transmitters industry, mainly selling world-famous instrument and transmitters brands.

Q:Our advantage
A:We have been in the industry for many years, and we have strong supply chain relationships and large inventories, with great price advantages. 
I will try my best to give you the best price,prove that we are sincere. 

Q:Can't find the model you need?
A:We have only shown some models,If the model you need is not found here,please contact us

Q:What else can you get product from our store?
A:We have a professional and efficient technical team. We will serve you 7X24 hours. If you have any questions about our products, please do not hesitate to contact us soon