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Sierra 840, 860, 830 instruction manual Electromagnetic Valves High Flow Controllers

Models: 840 830 860

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Series 830/840/860 Instruction Manual

Chapter 4 Maintenance

 

 

Caution! When using toxic or cor- rosive gases, purge the unit thoroughly with inert dry gas before discon- necting from the gas line.

4.The small circuit board may be separated from the main board to ease removal of the coil. To separate, first remove the plastic #4 mounting screw located in the center of the main circuit board and carefully pull the two boards apart. Remove the four 4-40 socket head cap screws at the base of the valve. Separate the valve from the flow body.

5.There are three O-rings sealing the valve assembly: one be- tween the base and the flow body, one under the valve seat (orifice), and one on the top adjusting screw inside the valve. Inspect the O-rings for damage and replace as necessary. (You should replace all O-rings whenever the valve is disassembled.)

6.Inspect the valve seat and plug for corrosion or roughness and replace as necessary.

7.Re-assemble components. Note: the 5/8 inch nut must not be tightened with more than 10 in-lb of torque.

8.When the controller is re-installed in the system, leak test the connection.

9.Adjust the valve for proper operation as given in the controller valve adjustment procedure.

Electromagnetic Valves - High Flow Controllers

The high flow electromagnetic valve is similar in design to the low flow valve. As with the low flow valve, cleaning can often be ac- complished by opening the valve using the purge function and flushing in both directions. Alternatively, the valve may be manu- ally opened by loosening the 6-32 lock nut on top of the valve and turning the adjustment screw fully counterclockwise.

To disassemble the high flow valve:

1.Remove the unit from the system.

2.Remove the two 4-40 Phillips head screws from the top of the enclosure. Remove the enclosure by sliding it up and off. Re- move the metal cap on top of the valve by inserting a flat tip screwdriver between the two parts and lifting upward.

IM-83/84/86-H

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Sierra 840, 860, 830 instruction manual Electromagnetic Valves High Flow Controllers
Page 42 Page 44

840, 830, 860 specifications

The Sierra 860, 830, and 840 are a series of rugged outdoor laptops designed for professionals who require reliable and powerful computing solutions in challenging environments. These laptops combine advanced technologies and robust construction to meet the demands of various fields, including engineering, military, field services, and outdoor research.

One of the standout features of the Sierra series is its rugged design. Constructed with military-grade materials, these laptops are highly resistant to shock, vibration, and extreme temperatures. They have undergone rigorous testing according to MIL-STD-810G standards, which ensures they can withstand harsh conditions whether in the field or during transport. Additionally, the IP65 rating guarantees protection against dust and water exposure, making them invaluable for professionals working in inclement weather or dusty environments.

The Sierra 860, 830, and 840 are powered by high-performance processors, delivering fast and efficient processing capabilities. Equipped with the latest Intel Core processors, including i5 and i7 options, these laptops can handle demanding applications and multitasking with ease. The robust memory options, ranging from 8GB to 32GB, ensure smooth performance for memory-intensive tasks.

Display quality is another critical aspect of these laptops. The Sierra series features high-resolution screens that offer bright, vivid colors and sharp details, making them ideal for tasks requiring precision, such as drafting and design work. The touch-enabled displays enhance user interaction, providing convenience in outdoor settings where traditional input methods may be challenging.

The Sierra laptops also include a comprehensive array of connectivity options, ensuring seamless integration with various devices. With multiple USB ports, HDMI output, and optional mobile broadband, users can easily connect to peripherals, transfer data, and maintain communication. The inclusion of enterprise-level security features, including biometric scanners and encrypted storage, ensures sensitive data remains protected.

Battery life is another crucial factor in fieldwork, and the Sierra series excels in this area. With long-lasting batteries, these laptops can operate for extended periods without needing a recharge, making them perfect for long outdoor excursions or remote job sites.

In summary, the Sierra 860, 830, and 840 combine ruggedness, high performance, and extensive connectivity options, making them exceptional computing solutions for professionals in various challenging environments. Their advanced technologies and robust constructions ensure they can tackle the demands of outdoor work while maintaining reliability and efficiency.