Manuals / Sierra / Marine Equipment / Marine Sanitation System

Sierra 860, 840, 830 Valve Maintenance, Electromagnetic Valves Low and Medium Flow Controllers

Models: 840 830 860

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Chapter 4 Maintenance

Series 830/840/860 Instruction Manual

 

 

Valve Maintenance

Electromagnetic valves may require spring-tension adjustments for various reasons (See Valve Adjust Procedure). No maintenance is required under normal operating conditions other than an occa- sional cleaning. Use of certain corrosive gases may require fre- quent replacement of the valve plug and O-rings. This indicates a need for a different elastomer. Viton is standard, with Neoprene, Kal-Rez (or equivalent), and PFA Teflon offered as options.

Do not attempt any valve adjustments while the meter is “on-line” with any dangerous gas. All controllers should be thoroughly leak- tested following any valve adjustment.

For the Model 860 Auto-Trak, refer to “Piston Tube Calibration Procedure” for instructions on how to re-adjust the electromagnetic valve for proper operation.

Electromagnetic Valves - Low and Medium Flow Controllers

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

Controllers with a low or medium flow body use the same valve; high flow models use a larger version. 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 low and medium flow valve for inspection:

1.Remove the unit from the system.

2.Remove the two 4-40 Phillips head screws on top of the enclo- sure. Remove the enclosure by sliding it up and off. Remove the metal cap on top of the valve by inserting a flat tip screw- driver into the slots provided and prying upward.

3.Use a 5/8 inch nut driver to loosen and remove the 5/8 inch nut at the top of the valve. Remove the coil, coil enclosure and warp washer.

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Sierra 860, 840, 830 instruction manual Valve Maintenance, Electromagnetic Valves Low and Medium Flow Controllers
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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.