HUNGER PARTS

7.874" x 8.661" x 0.630" (200.00 mm x 220.00 mm x 16.00 mm)

H&D SKU: PU-TDA 220X200X16

Product Availability : On Back Order

List Price: $461.08

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DESCRIPTION

Manufactured by Hunger Hydraulics®, the PU-TDA is a metric tandem seal used to seal pistons, plungers, and accumulators. The PU-TDA consists of 2 parts; an elastic ring made of polyurethane with a sealing lip, and a slide ring made of abrasion resistant Bronze-filled PTFE with a sealing edge. Prior to fitting, the sealing lip protrudes beyond the nominal diameter of the seal and is pressed against the cylinder wall after fitting. Thus effective sealing is provided even at zero pressure.

The slide ring is surrounded by the elastomer sealing ring and moves axially in direct contact with the inside of the tube. With increasing pressure and compression of the sealing ring, it is the slide ring which is predominantly pressed against the inside of the cylinder. The slide ring sealing edge produces an annular cavity where any oil that has passed the elastomer lip is collected. During the return stroke, the collected oil is forced back into the cylinder.

SEAL INFORMATION

Material Type (Primary Seal): POLYURETHANE

Material Type (Slide Ring): BRONZE-FILLED PTFE

Durometer (Shore A) POLYURETHANE: 87

Durometer (Shore D) SLIDE RING: 69

Temperature Range (F): -31 TO 212

Max Pressure (psi) - STANDARD PISTON DESIGN: 6500

Max Pressure (psi) - REINFORCED PISTON DESIGN: 9100

NOTE: THE STANDARD PISTON DESIGN PERMITS USE TO 6,500 PSI AND THE REINFORCED PISTON DESIGN UP TO 9,100 PSI. PLEASE CONTACT THE H&D TECHNICAL GROUP WITH INQUIRIES.

Mating Surface Roughness - Ra (µm) - DYNAMIC: 0.3<>0.5

Mating Surface Roughness - Ra (µm) - STATIC: 0.8 MAX

Part Number Definition (Metric): PU-TDA (BORE DIAMETER)X(ID)X(HT)

Additional Part Number Definition (Metric): 200MM BORE X 180 ID X 16 HEIGHT = PU-TDA 200X180X16

Products specifications

ID (Inch)	7.874
OD (Inch)	8.661
Height (Inch)	0.630
ID (Metric)	200.00
OD (Metric)	220.00
Height (Metric)	16.00

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