M641 Graphite Packing, API 641, 310 Bar, Quarter-turn Valve

Product Name: M641 Combination Packing, Graphite Packing

The M641 combination packing is a low-emission sealing solution designed for quarter-turn valves, meeting major low fugitive emission standards such as API 622, ISO 15848, and TA-LUFT.

1. Structure

Sealing rings feature a high-purity die-formed flat graphite ring in the middle section.
End rings are made from M602 die-formed packing material, ensuring reliable sealing performance.

2. Operating Conditions

Temperature Range: -200°C to +450°C (Air); +450°C (Steam)
Pressure Range: up to 4,500 PSI / 310 bar
pH Range: 0 to 14 (excluding strong oxidizers)

3. Compliance & Standards

ISO 15848-1 (up to 400°C)
API-622 (1/4 inch), 2nd Edition
TA-LUFT

4. Performance Under API 641 Fugitive Emission Test

Average Emission Leakage: 4 PPMv
Maximum Emission Leakage: 15.9 PPMv
No need for bolt adjustment after installation (zero bolt retightening cycles)

API 622 TUV Experimental Data Report

Data Report of M641 Packing Group in ISO 15848-1 400 Degree Type Test for Floating Ball Valve

Promotion Conference on Low-Leakage Graphite Packing Technology

The Demonstration of Low-emission Graphite Packing

We conduct life testing experiments on graphite packing in our factory

The ISO 15848-1 test of graphite packing at 400°C was conducted by a third-party testing institution

The promotion of our sealing products at the Valve Technology Forum