Hubbell STH manual Section IV Adjustment of Temperature Regulators

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SECTION IV – ADJUSTMENT OF TEMPERATURE REGULATORS

1.The spring tension on temperature regulators is adjusted at the factory to meet design conditions. However, design conditions may vary from actual operating conditions and re- adjustment might be required on this job.

2.Whenever possible, Hubbell uses “fail safe” regulators. This means that if the controlling medium, such as air or water is lost, the valve will close under it’s own spring tension.

3.ADJUSTMENT OF 2-WAY AIR OR WATER OPERATED VALVES

a.Release all air pressure from the diaphragm.

b.Apply steam pressure to the valve.

c.If at this point, there is pressure on the downstream side of the valve, or if steam can be heard passing through the valve, valve spring tension needs to be increased.

d.Turn the spring adjustment screw slowly to increase spring tension until the pressure on the down stream side of the valve has dropped to “0” and there is no sound of flow through the valve. Do not turn spring adjustment past this point.

If the valve will not open with air on the diaphragm, spring is adjusted too tightly.

(1)Release all air pressure from the valve diaphragm.

(2)Apply steam pressure to the valve.

(3)Loosen tension on the spring until steam begins to seep through the valve.

(4)Slowly, tighten spring tension until flow stops.

(5)Do not turn spring adjustment past this point.

4.ADJUSTMENT OF 3-WAY AIR OR WATER OPERATED VALVES

a.Turn thermostat down so that no air pressure is on the valve diaphragm. If unit continues to heat, valve spring tension needs to be increased.

b.Shut off heating medium.

c.Disconnect stem coupling (A).

d.Lift lower stem (B) and hold against upper valve seat.

e.Turn adjustment screw (C) until there is approximately a 1/16-inch gap between the two stem halves.

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Contents Electric Heater Company STRATFORD, CT Hubbell Electric Heater CompanyTable of Contents Section Title Page Page Nomenclature for Parts Nomenclature for Accessory Parts Page Tank Section I General Description and ConstructionOuter SHELL, INSULATION, and Supports Tank ConnectionsSteam Heating Coil Traps Steam Operating ControlsOptions Single Solenoid Safety SystemWater Heater Placement Section II Installation and OperationPiping Installation HOOK-UP of AIR and Water Operated Controls Electrical Installation Typical Piping DiagramStartup Filling the HeaterShutdown Quarterly Inspection Section III Scheduled Maintenance and ServicingAnnual Inspection Page Page Page Page Single Safety Solenoid System if installed Double Safety Solenoid System if installed Adjustment of 2-WAY AIR or Water Operated Valves Section IV Adjustment of Temperature RegulatorsAdjustment of Pilot Operated Valves Page Overheating Section V TroubleshootingExcessive vibration Section VI Miscellaneous Charts and Formulas Torque Values Metric Conversions

STH, ST specifications

Hubbell ST and STH connectors are pivotal components in the realm of power and data transmission. Known for their durability and reliability, these connectors are widely implemented in both commercial and industrial applications. Their design caters to the need for efficient connectivity while ensuring safety and performance.

The Hubbell ST connector is engineered with a robust, user-friendly configuration that allows for quick and simple installations. It features a bayonet-style coupling mechanism, which ensures that the connection is secure and resistant to accidental disconnection. This design is especially beneficial in high-vibration environments, making it ideal for use in various industries, including telecommunications, aerospace, and manufacturing.

On the other hand, the STH connector is specifically designed for high-temperature applications and environments where harsh conditions prevail. It is made from high-temperature materials that can withstand significant thermal stress, thus ensuring consistent performance even in challenging conditions. This feature is particularly crucial for industries such as oil and gas, renewable energy, and any sector that relies on high-performance machinery.

Both ST and STH connectors utilize advanced technologies to enhance their performance. They incorporate precision-engineered contact surfaces that allow for optimal electrical flow, while minimizing signal loss. This is especially important in data-intensive industries where maintaining signal integrity is critical. Additionally, these connectors feature insulation systems that provide protection against moisture, dust, and other environmental factors, significantly prolonging their lifespan.

One of the standout characteristics of Hubbell connectors is their versatility. They come in various configurations and sizes, allowing them to cater to a wide range of applications, from telecommunications to industrial machinery. The connectors can handle different voltage levels and current ratings, thus accommodating the requirements of diverse operational setups.

In conclusion, Hubbell ST and STH connectors represent reliability and functionality in connectivity solutions. Their robust construction, advanced technologies, and adaptability make them a top choice for professionals looking for efficient and dependable connectors in demanding environments. Whether it’s ensuring seamless data transmission or providing power to critical systems, Hubbell connectors stand out as a preferred solution across many industries.
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