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TAIZHOU GOSIN COPPER INDUSTRY CO., LTD.

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One-Time Tightening ≠ Permanent Sealing: Gasket Cold Flow Characteristics and Hot Retorquing Guidelines

One-Time Tightening ≠ Permanent Sealing: Gasket Cold Flow Characteristics and Hot Retorquing Guidelines

PTFE/rubber gaskets have cold flow (stress relaxation) characteristics: after 24 hours of operation, the gasket is compressed thin, and the bolt torque automatically decreases by 20-30%.

09

2025

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09

From 1.6 MPa to 0.9 MPa: Why Does the Same Valve "Lose Strength" at High Temperatures? — A Guide to Using Pressure-Temperature (PT) Rating Curves

From 1.6 MPa to 0.9 MPa: Why Does the Same Valve "Lose Strength" at High Temperatures? — A Guide to Using Pressure-Temperature (PT) Rating Curves

The pressure temperature rated curve (PT curve) - it determines whether the valve can be used under your operating conditions, and how much heat and pressure can be used.

09

2025

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09

Should It Close or Stay Open During a Power Failure? — Safety Guidelines for Selecting Normally Closed vs. Normally Open Solenoid Valves

Should It Close or Stay Open During a Power Failure? — Safety Guidelines for Selecting Normally Closed vs. Normally Open Solenoid Valves

When the power is lost, the valve core closes by the spring force, and when powered on, the electromagnetic force overcomes the spring and opens.

09

2025

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09

What are the common symptoms of HVAC system malfunctions?

What are the common symptoms of HVAC system malfunctions?

When cooling, the air outlet temperature is ≥ 15 ℃, when heating is ≤ 30 ℃, or the temperature difference between different areas in the same room is>3 ℃ - mostly due to filter blockage, dirty coils, refrigerant leakage, or hydraulic/air volume imbalance.

09

2025

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09

What problems can arise from an unreasonable HVAC system design?

What problems can arise from an unreasonable HVAC system design?

High initial investment and space occupation; Frequent start stop of equipment, shortened lifespan, insufficient dehumidification, and indoor humidity.

09

2025

/

09

What problems can arise from an unreasonable HVAC system design?

What problems can arise from an unreasonable HVAC system design?

Choose high energy efficiency ratio (such as variable frequency compressor, EC fan) and main engine with heat recovery function, with capacity calculated based on actual load, to avoid "big horse pulling small car" or "small horse pulling big car".

09

2025

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09

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高盛铜业

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Address: Chumen Qianpai Industrial Area, Yuhuan City, Zhejiang Province, China

Phone: +86-576-87107818

Email: gosin@china-gosin.com

Fax: +86-576-87101452

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