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Product Performance. Affordability. Availability.

P I S T O N S E A L

PC

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P I S T O N S E A L

PC

P I S T O N S E A L

PC The PC Series Piston Seal is a compact double acting piston seal designed for a one piece piston construction. The PC Piston Seal provides effective sealing at both low pressure and low temperature. It is ideally suited for high pressure capabilities in heavy duty and long stroke cylinder applications. This seal is often referred to as a “zero drift” piston seal due to its robust design and positive sealing performance.

The PC Piston Seal is a four piece assembly comprising of a self-lubricating wear resistant PTFE seal ring, which is uniformly loaded by a low temperature nitrile rubber energizer. Split Nylon anti-extrusion backup rings fully support the seal ring from high pressure extrusion and provide added contamination protection. Due to the integrated backup ring design, larger than normal piston clearance can be utilized allowing for additional wear ring bearing exposure, thereby eliminating metal-to-metal piston contact with the cylinder tube during heavy side loading.

The PC Piston Seal can be utilized in a variety of demanding hydraulic cylinders requiring high reliability and long life performance, which is particularly suited for earth moving and other mobile equipment applications. The product range consists of industry standard sizes to accommodate imperial (inch) dimensioned housings.

Standard Materials • Backup Ring: NY46 Nylon 4/6 • Energizer: N80 80D Low Temperature Nitrile (NBR) Rubber • Seal Ring: T45 Bronze + Carbon Fiber Reinforced PTFE

T40 Bronze Reinforced PTFE (PC9-12000 to PC9-15000) Other material options are available upon request.

Technical Specifications Operating Condition

Features • High Pressure Capability • Bi-Directional Piston Seal • Low Friction • High Extrusion Resistance • High Wear Resistance • Zero Drift • Contamination Resistance • Excellent Reliability • Compact Low Profile Design• Robust Design

Parameter Unit Low Extreme Normal Operation High Extreme

Pressure psi   0 — 7,500 12,500

Temperature °F –65 –40 — 250 275

Speed fps   0 — 5 10

Note Continuous operation at any one of the extreme conditions may result in substantially reduced seal life.

PISTON SEALS

Bore Dia.

Groove Dia.

Groove Width

L1

Radius 1(2 Places)

Radius 2(2 Places)

R1 R2

ØD1

Ød1

Series 3,000 psi 5,000 psi 7,500 psi

PC3 0.030” 0.026” 0.030”

PC5 0.034” 0.030” 0.024”

PC7 0.034” 0.030” 0.024”

PC8 0.036” 0.032” 0.026”

PC9 0.044” 0.036” 0.030”

Extrusion Gaps

Maximum recommended diametrical extrusion gap @ 180°F when taking into consideration the maximum eccentricity of the piston and utilizing precision tolerance wear rings.

P I S T O N S E A L

PC

For surface finish recommendations visit BlackHawkSeals.com/Engineering

PISTON SEALS

P I S T O N S E A L

PC

H9 and h9 tolerance per ISO 286. Additional sizes may be available.

Part NumberBore Dia. Groove Dia. Groove Width Radius

“D1” “d1” “L1” R1 R2PC3-02000-T45 2.000

Tole

ranc

e H

9

1.444

Tole

ranc

e h9

0.295

Tole

ranc

e -0

.000

/ +

0.01

0

0.01

0 R

Max

0.02

0 R

Max

PC3-02500-T45 2.500 1.944 0.295PC3-02750-T45 2.750 2.144 0.295PC5-03000-T45 3.000 2.442 0.420PC5-03250-T45 3.250 2.692 0.420PC5-03500-T45 3.500 2.942 0.420PC5-03750-T45 3.750 3.192 0.420PC5-04000-T45 4.000 3.442 0.420PC5-04250-T45 4.250 3.692 0.420PC5-04500-T45 4.500 3.942 0.420PC5-04750-T45 4.750 4.192 0.420PC5-05000-T45 5.000 4.442 0.420PC7-01500-T45 1.500 1.127 0.424PC7-01750-T45 1.750 1.377 0.424PC7-02000-T45 2.000 1.627 0.424PC7-02250-T45 2.250 1.877 0.424PC7-02500-T45 2.500 2.127 0.424PC7-02750-T45 2.750 2.377 0.424PC8-03000-T45 3.000 2.522 0.579

0.02

5 R

Max

PC8-03250-T45 3.250 2.772 0.579PC8-03500-T45 3.500 3.022 0.579PC8-03750-T45 3.750 3.272 0.579PC8-04000-T45 4.000 3.522 0.579PC8-04250-T45 4.250 3.772 0.579PC8-04500-T45 4.500 4.022 0.579PC8-04750-T45 4.750 4.272 0.579PC8-05000-T45 5.000 4.522 0.579PC8-05250-T45 5.250 4.772 0.579PC8-05500-T45 5.500 5.022 0.579PC8-06000-T45 6.000 5.522 0.579PC8-06250-T45 6.250 5.772 0.579PC8-06500-T45 6.500 6.022 0.579PC9-05000-T45 5.000 4.274 0.750

0.03

5 R

Max

PC9-05250-T45 5.250 4.524 0.750PC9-05500-T45 5.500 4.774 0.750PC9-05750-T45 5.750 5.024 0.750PC9-06000-T45 6.000 5.274 0.750PC9-06250-T45 6.250 5.524 0.750PC9-06500-T45 6.500 5.774 0.750PC9-07000-T45 7.000 6.274 0.750PC9-07500-T45 7.500 6.774 0.750PC9-08000-T45 8.000 7.274 0.750PC9-08500-T45 8.500 7.774 0.750PC9-09000-T45 9.00 8.274 0.750PC9-09500-T45 9.50 8.774 0.750PC9-10000-T45 10.00 9.274 0.750PC9-10500-T45 10.50 9.774 0.750PC9-11000-T45 11.00 10.274 0.750PC9-12000-T40 12.000 11.274 0.750PC9-12500-T40 12.500 11.774 0.750PC9-13000-T40 13.000 12.274 0.750PC9-14000-T40 14.000 13.274 0.750PC9-14500-T40 14.500 13.774 0.750PC9-15000-T40 15.000 14.274 0.750

10515 Majic Port Lane | Fort Wayne, IN 46819 | USATelephone: 260-615-3951 | Fax: 260-436-5267info@BlackHawkSeals.com | BlackHawkSeals.com