Level Indicators - Level Cock Gauge - 00000159 - Packing Sleeves | Fival Srl

Fival F16 – Replacement Packing Ring for Level Gauge Valves

The Fival F16 is a replacement sealing ring designed for use in the gland assembly of level gauge valves. It provides controlled compression around moving or stationary stems, ensuring leak-tight operation for water, steam, or process fluids. The F16 is referenced as a replacement packing ring for Fival-type F16 gauge cocks in technical documentation.

F16 Dimensions

According to the technical drawing, the F16 type is specified as follows:

• Inner diameter: Ø16 mm
• Outer diameter: Ø23.5 mm
• Length/thickness: 10 mm

The same datasheet includes other packing sleeve types (F12.2, F12.3, F18.2, F18.3, F22.2) with different bore counts and dimensions (ØA, ØB, ØD, C).

Sealing Materials

Available material options include:

• Graphite: Standard for saturated steam, water, gases, hydrocarbons, and oils.
• PTFE: Used for aggressive acids, light gases, food-grade, and cryogenic circuits.

Material selection should consider process media, temperature, chemical compatibility, and valve operation frequency.

Applications

F16 rings are used in gauge cocks and level indicators for:

• Steam boilers
• Condensate tanks
• Feedwater tanks
• Auxiliary process vessels
• Steam, water, gas, or oil circuits

Maintenance & Replacement

Replacement requires a clean seating surface, uniform gland tightening, and inspection of the stem for scoring or corrosion. Excessive tightening increases operating torque; insufficient compression may cause minor leakage at the gland.