Product Description
In the complex landscape of industrial automation, the accurate control of valves is of paramount importance. The Koso EPC815 Electro Pneumatic Valve Positioner emerges as a key component in ensuring the precise and reliable operation of pneumatic control valves. This advanced device plays a crucial role in various industries, from oil and gas to chemical processing, by translating electrical control signals into precise pneumatic outputs that position valves accurately
Pneumatic Actuation
The air pressure output from the electro - pneumatic converter is then directed to the pneumatic actuator of the control valve. Pneumatic actuators can be of different types, such as diaphragm actuators or piston actuators. In the case of a diaphragm actuator, the air pressure acts on a flexible diaphragm. As the pressure increases, the diaphragm is forced to move, which is connected to the valve stem. This movement of the diaphragm causes the valve stem to move, either in a linear or rotary motion depending on the type of valve.
Output Pressure Range
The output air pressure of the EPC815 can be adjusted to suit the requirements of different pneumatic actuators and control valves. Typically, it can provide an output pressure range from 0.02 MPa to 0.1 MPa (20 kPa to 100 kPa), which is sufficient for most common pneumatic actuator applications. However, in some models, the output pressure range may be adjustable to cover a wider or more specific range, depending on the needs of the industrial process.
Response Time
In dynamic industrial processes, the response time of the valve positioner is an important factor. The EPC815 is designed to have a fast response time, typically within 0.5 seconds or less. This means that when a change in the input control signal occurs, the positioner can quickly adjust the air pressure output and move the valve to the new desired position. A short response time helps in minimizing process upsets and maintaining stable operation, especially in applications where rapid changes in process conditions are common.
Product Parameters
| Parameter |
Specification |
| Model |
KOSO EPC815 |
| Type |
Electro-Pneumatic Valve Positioner |
| Input Signal |
4-20 mA DC (standard), HART protocol (optional) |
| Supply Pressure |
1.4-7 bar (20-100 psi) |
| Output Pressure |
0-100% of supply pressure |
| Air Consumption |
< 0.05 Nm³/h (at steady state) |
| Accuracy |
±1% of full scale (with linear characteristic) |
| Repeatability |
±0.2% of full scale |
| Hysteresis |
≤0.5% |
| Ambient Temperature |
-40°C to +85°C (-40°F to +185°F) |
| Housing Protection |
IP66, NEMA 4X (weatherproof & corrosion-resistant) |
| Mounting |
Direct mounting on rotary (90° movement) or linear valves |
| Materials |
Aluminum housing, stainless steel fittings |
| Certifications |
ATEX, IECEx, SIL 2 (optional) |
| Connection Ports |
1/4" NPT (standard), G1/4, G1/2 (optional) |
| Weight |
Approx. 2.5 kg (5.5 lbs) |
Company Profile
KeRui (weifang) Automation Equipment Co., Ltd.specializes in industrial automation instrument development, production and sales, technical services, and supportingequipment 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 felds.
Display of company strength
KeRui (Weifang) Automation Equipment Co., Ltd. has maintained a cooperative relationship with Rosemount for 15 years, and our purchase quantity has reached 20,000 units.
We supplied the tuning fork level gauge to the Rosemount factory, and it has been well-received by the Beijing factory. We have cooperated with Yokowaga and maintained a cooperative relationship for 8 years, and our purchase quality has reached 7000 units.
The companies we have cooperated with:
1. Awarded "Outstanding Supplier by Yanchang Petroleum in 2008
2. In December 2012, our company was awarded the "Excellent Equipment Service Award" for the expansion project of units 6 and 7 of the Guangdong Guohua Yuedaishan Power Plant
3. Awarded "Outstanding Supplier by Yaxing Group in 2013
4.200 transmitters for Haihua Group's ethylene debottlenecking transformation project in 2015.
5. In 2018, we were rewarded as a National Nuclear Power Instrumentation Industry Measurement and Testing Alliance member.
6.160 transmitters and 20 electric actuators for the Shandong Laigang Yongfeng Steel expansion project in 2019
7. In 2022, Jinneng Chemical (Qingdao) Co., Led/ Jinneng 2x450,000 tons/ year high-performance polypropylene project (newly built), equipped with 460 transmitters from our company.
8. In 2022, Shandong Qinghe Chemical Technology Co., Ltd.'s hydrogen peroxide method epoxy propane device and supporting hydrogen peroxide device expansion project used 253 pressure transmitters.
9. In 2022, the Wanhua Chemical HTN project NPG installed 320 transmitters and 50 sets of valve positioners.
FAQ
Q1: How long will it take you to give me the reply?
A: We will reply to you as soon as we see the information
Q2: What is the delivery time?
A: Our delivery time is within 3- 7 days after we get your payment; for large quantity mass orders, the time should be confirmed again with you
Q3: How about your package?
A: Do not worry about the package. We have a lot of experience in packing, and all our packages are wooden case packages.
Q4: How about the payment terms?
A: You can choose T/T.
Q5: Do you provide samples?
A: Yes, we have materials in stock to help you get the samples as soon as we can.
Q6: What is the MOQ?
A:1PC.
Q7: Can I get a lower price if I order large quantities?
A: Yes, cheaper prices are available with larger orders.
Q8: Why choose us?
A: We have a perfect customization, not only to provide you with quality products, but also to have a professional customer service team available at any time to provide you with support. We pay more attention to establishing a long-term cooperative relationship with you to achieve continuous business growth.
Q9: How can we guarantee quality?
A: We have strict requirements on the quality of our products, and we will conduct a final inspection of our products when we ship them.
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