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Gland Packing Materials

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Following packing materials are optional depending on the conditions.

Packing Materials		Service conditions
Flexible Grahite	Die-formed Rings	600C(1110F) Corrosion resistant
	Braided Graphite Yarn
PTFE cup & cone/PTFE V-ring		150C (300F) Corrosion resistant
Carbon fiber		500C (930 F) High pressure
Inconel wired flexible graphite		600 C (1110F) Corrosion resistant
Braided PTFE fiber		260 C (500F) Corrosion resistant

Inspection and test
Every piece of Sakhi cast steel valves is subjected to 100% pressure tests according to API 598 or BS 6755 part 1 requirement. Manufacturer's material test report and inspection certificates are available on your request.
Sakhi can do the following test and inspection according to the requirement of order.

Test/ Inspection Item	Method	Evaluation
Chemical composition analysis		Relevant ASTM Stds.
Mechanical property test	ASTM A370	Relevant ASTM Stds.
Pressure test	API 598 or BS EN12266	API 598
Radiographic inspection	ASTM E142/E49	ASME B 16.34
Wet magnetic partice inspection	ASTM E138
Liquid penetration inspection	ASTM E165
Low temperature impact test	ASM E23	ASTM A352
Dimensional inspection		Relevant valve Stds.
Visual inspection		MSS SP-55
Emission test	EPA Method 21 and Sheel specification	Shell specification
PMI	Manufacturer Std

Low Emission Service Valves

Sakhi offers low emission service valves. The valves comply with environmental protection requirements. Our developed low emission valves are designed, manufatured and tested to meet less than 100ppm.

Live-loading. Two sets of plate springs maintain a permanent packing stress of 3500-4000psi. Live-loading extends low emission service life especially in services with large
pressure/temperature transients or frequent cycling.

Leak-off. For critical service a lantern ring and double packing can be provided with a leak-off connection. The leak-off is provided to allow collection of leakage from the lower packing set.

Stem 16-32 RMS surface finish, straightness and roundness are precisely controlled.
Stuffing box-Maximum 63 RMS surface finish. Cylindricity and verticality are precisely controlled.

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