Parker Rod Seals

Hydraulic Rod Seals for the Fluid Power Industry

ESP International is your source for a wide range of Parker rod seals to meet the broad demands of the fluid power industry. Parker offers a variety of compounds, materials, and engineered designs for best possible solutions.

Rod seals guard against external leakage and are one of the most vital components of the sealing system. Cutting-edge technologies from Parker include multiple sealing lip systems, shock-load resistance, low friction and ultra-dry capability.

Click a profile for more details:

BD – Premium O-ring Energized Lip Seal

The BD profile is a non-symmetrical profile rod seal. It’s rectangular shaped cross section ensures stability in the gland. The o-ring energizer functions as a spring to maintain sealing contact under low pressure or vacuum applications. The knife trimmed, beveled lip does an excellent job wiping fluid film. A stabilizing lip is located below the primary sealing lip, just above the base of the seal, to provide enhanced sealing performance and ensure a tight, stable fit in the gland.

Long Life
Extrusion Resistance
Low Compressions Set
Shock Load Resistance

Technical Data

Standard Materials	Temperature Range	Pressure Range	Surface Speed
P4300A90	-65°F to +275°F (-54°C to +135°C)	5000 psi (344 bar)	< 1.6 ft/s (0.5 m/s)
P4301A90	-65°F to +275°F (-54°C to +135°C)	5000 psi (344 bar)	< 1.6 ft/s (0.5 m/s)

Alternate Materials: For applications that may require an alternate material, please consult ESP.

† Pressure Range: without wear rings. Pressure Range with positively-activated back-up to 10,000 psi (688 bar).Options: A back-up ring located in the heel of the BD profile can be provided for enhanced extrusion protection.

BT – Premium U-cup Rod Seal

The BT profile is a non-symmetrical design for use in hydraulic rod sealing applications. Using Finite Element Analysis, the BT profile was designed to provide improved sealing performance and stability in the gland. A knife trimming process is used to form the beveled lip which is best for removing fluid from the rod. By design, the BT profile has a more robust primary sealing lip than the BS profile and the stabilizing lip is located at the base of the heel.

Long Life
Extrusion Resistance
Low Crompression Set
Shock Load Resistance

Technical Data

Standard Materials	Temperature Range	Pressure Range†	Surface Speed
P4300A90	-65°F to +275°F (-54°C to +135°C)	5000 psi (344 bar)	< 1.6 ft/s (0.5 m/s)

Alternate Materials: For applications that may require an alternate material, please consult ESP.

† Pressure Range: without wear rings. Pressure Range with positively-activated back-up to 10,000 psi (688 bar). Options: A back-up ring located in the heel of the BT profile can be provided for enhanced extrusion protection.

BR – Premium Buffer Seal

The BR profile is a compact rod seal designed to act as a buffer seal for the primary rod seal. As a buffer seal, the BR profile provides the majority of the rod sealing performance while allowing fluid to bypass and energize the primary rod seal. Fluid located between the BR profile and the rod seal will relieve back into the cylinder by flowing past the BR profile’s flexible static side lip and slotted pedestals. This relieving, or check valve function, allows the BR profile and primary rod seal to work as a sealing system without danger of developing a pressure trap. As a sealing system, the BR profile and primary rod seal provide optimal performance in the most difficult applications.

Technical Data

Standard Materials	Temperature Range	Pressure Range†	Surface Speed
P4300A90	65°F to +275°F (-54°C to +135°C)	5000 psi (344 bar)	< 1.6 ft/s (0.5 m/s)
Back-Up
W4655	-65°F to +250°F (-54°C to +93°C)	10,000 psi (688 bar)	< 1.6 ft/s (0.5 m/s)

Alternate Materials: For applications that may require an alternate material, please consult ESP.

† Pressure Range: with positively-activated back-up to 5,000 psi (344 bar).

B3 – U-cup Rod Seal

The B3 profile is a non-symmetrical design for use in hydraulic rod sealing applications. The diameter of the B3 profile is designed to ensure a tight static side seal when installed. The knife trimmed, beveled lip does an excellent job wiping fluid film.

Extrusion Resistance
Long Wear
Low Compression Set

Technical Data

Standard Materials	Temperature Range	Pressure Range†	Speed Surface
P4300A90	-65°F to +275°F (-54°C to +135°C)	5000 psi (344 bar)	< 1.6 ft/s (0.5 m/s)
P4301A90	-65°F to +275°F (-54°C to +135°C)	5000 psi (344 bar)	< 1.6 ft/s (0.5 m/s)
P4700A90	-65°F to +200°F (-54°C to +93°C)	5000 psi (344 bar)	< 1.6 ft/s (0.5 m/s)
P5065A88	-70°F to +200°F (-57°C to +93°C)	3,500 psi (241 bar)	< 1.6 ft/s (0.5 m/s)

Alternate Materials: For applications that may require an alternate material, please consult ESP.

† Pressure Range: without wear rings.

BS – U-cup Rod Seal with Secondary Stabilizing Lip

The BS profile is a non-symmetrical profile designed for use in hydraulic rod sealing applications. The knife trimmed beveled sealing lip does an excellent job wiping fluid from the rod. In addition, a secondary stabilizing lip is located just above the base of the seal to provide enhanced sealing performance and ensure a tight, stable fit in the gland.

Technical Data

Standard Materials	Temperature Range	Pressure Range†	Surface Speed
P4300A90	-65°F to +275°F (-54°C to +135°C)	5000 psi (344 bar)	< 1.6 ft/s (0.5 m/s)
P4301A90	-65°F to +275°F (-54°C to +135°C)	5000 psi (344 bar)	< 1.6 ft/s (0.5 m/s)
P4700A90	-65°F to +200°F (-54°C to +93°C)	5000 psi (344 bar)	< 1.6 ft/s (0.5 m/s)
P5065A88	-70°F to +200°F (-57°C to +93°C)	3,500 psi (241 bar)	< 1.6 ft/s (0.5 m/s)

Alternate Materials: For applications that may require an alternate material, please consult ESP.

† Pressure Range: without wear rings.

UR – Industrial U-cup Rod Seal

The UR profile is a non-symmetrical, hydraulic cylinder rod seal. The knife trimmed, beveled lip faces the rod to provide enhanced low to high-pressure sealing and wiping action.

Technical Data

Standard Materials	Temperature Range	Pressure Range†	Surface Speed
P4615A90	-65°F to +200°F (-54°C to +93°C)	5000 psi (344 bar)	< 1.6 ft/s (0.5 m/s)

Alternate Materials: For applications that may require an alternate material, please consult ESP.

† Pressure Range: without wear rings.

E5 – Rounded Lip Pneumatic U-cup Rod Seal

Parker’s E5 profile is a non-symmetrical rod seal designed to seal both lubricated and non-lubricated air. To ensure that critical surfaces retain lubrication, the radius edge of the lip is designed to hydroplane over pre-lubricated surfaces.

Technical Data

Standard Materials	Temperature Range	Pressure Range†	Surface Speed
N4274A85	-10°F to +250°F (-23°C to +121°C)	250 psi (17 bar)	< 3 ft/s (1 m/s)
N4180A80	-40°F to +250°F (-40°C to +121°C)	250 psi (17 bar)	< 3 ft/s (1 m/s)
V4208A90	-5°F to +400°F (-21°C to +204°C)	250 psi (17 bar)	< 3 ft/s (1 m/s)
P5065A88	-70°F to +200°F (-57°C to +93°C)	250 psi (17 bar)	< 3 ft/s (1 m/s)

Alternate Materials: For applications that may require an alternate material, please consult ESP.

† Pressure Range: without wear rings.

TR – Compact Seal with Anti-Extrusion Technology

Parker’s TR profile rod T-seal is designed to retrofit o-rings in no backup, single back-up and two back-up standard industrial reciprocating o-ring glands. Its compact design provides improved stability and extrusion resistance in dynamic fluid sealing applications. The flange or base of the T-seal forms a tight seal in the gland and supports the anti-extrusion back-up rings. When energized, the back-up rings bridge the extrusion gap to protect the rubber sealing element from extrusion and system contamination. The T-seal eliminates the spiral or twisting failure that can occur when o-rings are used against a dynamic surface.

Technical Data

Base Elastomer*	Temperature Range	Surface Speed
N4115A75	-40°F to +225F (-40°C to +107°C)	< 1.6 ft/s (0.5 m/s)
N4274A85	-10°F to +250°F (-23°C to +121°C)	< 1.6 ft/s (0.5 m/s)
V4205A75	-20°F to +400°F (-29°C to +204°C)	< 1.6 ft/s (0.5 m/s)
E4259A80	-65°F to +300°F (-54°C to +149°C)	< 1.6 ft/s (0.5 m/s)

Alternate Materials: For applications that may require an alternate material, please consult ESP.

ON – PTFE Rod Cap Seal

The Parker ON profile is a bi-directional PTFE rod seal for use in low to medium duty hydraulic systems. The ON profile is a simple two piece design comprised of a standard size Parker o-ring energizing a wear resistant PTFE cap. The ON profile offers long wear and low friction, and because of its short assembly length, requires minimal space in the rod housing. The seal is commonly used in applications such as mobile hydraulics, machine tools, injection molding machines and hydraulic presses.

Technical Data

Standard Materials*	Temperature Range	Pressure Range†	Surface Speed
Cap
0401 - 40% Bronze-filled PTFE	-200°F to +575°F (-129°C to +302°C)	5000 psi (344 bar)	< 13 ft/s (4 m/s)
Energizer
A - 70A Nitrile	-30°F to +250°F (-34°C to +121°C)

Alternate Materials: For applications that may require an alternate material, please consult ESP.

† Pressure Range: without wear rings.

CR – PTFE Rod Cap Seal to Retrofit O-ring Glands

The Parker CR profile is a cap seal with anti-extrusion, low friction and low wear features. The seal is a bi-directional rod seal for use in pneumatic and low to medium duty applications. Because of its short assembly length, it requires minimal space in the rod housing. The three CR profiles will fit into standard o-ring grooves without modification. Parker’s CR profiles will retrofit non-Parker seals of similar design.

CR0 fits a standard o-ring groove
CR1 fits an o-ring groove designed for one back-up ring
CR2 fits an o-ring groove designed for two back-up rings

Technical Data

Standard Materials*	Temperature Range	Pressure Range†	Surface Speed
Cap
0401 - Bronze-filled PTFE	-200°F to +575°F (-129°C to +302°C)	5000 psi (344 bar)	< 13 ft/s (4 m/s)
Energizer
A - 70A Nitrile	-30°F to +250°F (-34°C to +121°C)

Alternate Materials: For pneumatic applications, compound 0102 is recommended. For applications that may require an alternate material, please consult ESP.

† Pressure Range: without wear rings.

OC – Compact PTFE Rod Cap Seal

The Parker OC profile is a bi-directional rod seal for use in pneumatic and low to medium duty hydraulic systems. The OC profile is a two-piece design utilizing a rectangular PTFE cap and standard size Parker o-ring. The OC profile is an excellent choice for applications requiring a compact design. The unique properties of the modified PTFE provide added wear resistance for improved cycle life. Parker’s OC profile will retrofit non-Parker seals of similar design.

Technical Data

Standard Materials*	Temperature Range	Pressure Range†	Surface Speed
Cap
0102 - Modified PTFE	-320°F to +450°F (-195°C to +282°C)	1,500 psi (103 bar)	< 13 ft/s (4 m/s)
Energizer
A - 70A Nitrile	-30°F to +250°F (-34°C to +121°C)

Alternate Materials: For applications that may require an alternate material, please consult ESP.

† Pressure Range: without wear rings.

OD – PTFE Buffer Seal

The Parker OD profile is a rod seal that can be used as a buffer seal in conjunction with a primary rod seal or in tandem with itself to form a sealing system for higher performance. The OD profile is a unidirectional seal, with a unique design that allows trapped fluid pressure back into the cylinder. When the rod extends from the cylinder the OD profile is riding on a sealing point, creating a high compression point to limit leakage. As the rod goes through its return stroke this seal rocks forward, creating a larger sealing surface on the rod. The compression force is spread out over a larger area allowing trapped fluid to pass under the seal and return to the system. This pressure relief feature allows the OD profile to be used in tandem or multiple seal arrangements.

Low Friction
Long Life
Versatility

Technical Data

Standard Materials*	Temperature Range	Pressure Range†	Surface Speed
Cap
0401 - 40% Bronze-filled PTFE	-200°F to +575°F (-129°C to +302°C)	5000 psi (344 bar)	< 13 ft/s (4 m/s)
Energizer
A - 70A Nitrile	-30°F to +250°F (-34°C to +121°C)

Alternate Materials: For applications that may require an alternate material, please consult ESP.

† Pressure Range: without wear rings.

V6 – Pneumatic Cushion Seal

The V6 profile provides a check valve type action for use in cushioning pneumatic cylinders. The V6 profile seals against the cushioning piston or spud, allowing pneumatic pressure to build and cushion the cylinder’s end stroke. Through a series of slots and pedestals the intake flow is then able to easily blow past the cushion seal to fill the cylinder. The installation of the cushion seal is very simple as it manually snaps into the groove recess.

Technical Data

Standard Materials	Temperature Range	Pressure Range†	Surface Speed
P4622A90	-65°F to +225°F (-54°C to +107°C)	250 psi (17 bar)	< 3 ft/s (1 m/s)
N4180A80	-40°F to +250°F (-40°C to +121°C)	250 psi (17 bar)	< 3 ft/s (1 m/s)
N4181A80	-40°F to +250°F (-40°C to +121°C)	250 psi (17 bar)	< 3 ft/s (1 m/s)
V4208A90	-5°F to +400°F (-21°C to +204°C)	250 psi (17 bar)	< 3 ft/s (1 m/s)

Alternate Materials: For applications that may require an alternate material, please consult ESP.

† Pressure Range: without wear rings.

OR – Rotary PTFE Cap Seal

The Parker OR profile is a bi-directional rod seal for use in pneumatic and low to medium duty rotary or oscillating applications. The OR profile is a two piece design comprised of a standard size o-ring energizing a wear resistant PTFE cap. The OR profile offers long wear and low friction without stick-slip. This PTFE outer diameter is designed with a special interference with the o-ring to eliminate spinning between the o-ring and seal. Special grooves are designed into the PTFE inner diameter to provide lubrication and create a labyrinth effect for reduced leakage. The seal is commonly used in swivel joints, hose reels, and machine applications.

Technical Data

Standard Materials*	Temperature Range	Pressure Range†	Surface Speed
Cap
0205 - 15% Fiberglass-, 5% MoS2-filled PTFE	-200°F to +575°F 3 (-129°C to +302°C)	3000 psi (206 bar)	< 3.3 ft/s (1.0 m/s)
Energizer
A - 70A Nitrile	-30°F to +250°F (-34°C to +121°C)