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Deep PolyPak Hydraulic Seal with Knife Trimmed Scraper Lips (DPP)
Parker’s DPP Profile, deep PolyPak® hydraulic seal is a rectangular shaped symmetrical squeeze seal with knife trimmed scraper ID and OD lips for rod and piston sealing.
Use our configurator to build the right part for your application.
Product Overview
Tech Specifications
Product Support
Fluid Power Seal Design Guide--EPS 5370
Performance Sealing Products for Hydraulic Fluid Power Equipment- EPS 5371
DPP Profile
Installation Techniques for Linear Fluid Power Seals
Installation Techniques for Linear Fluid Power Seals
Part Number Look-Up
Basic Sealing Technology-Linear Sealing
Sealing Technology Glossary of Basic Terminology
Design Action Request--DAR
Frequently Asked Questions
EPS Division, Nacogdoches, ISO 9001 AS9100D AS9104/1
EPS Division, SLC, IATF 16949:2016
EPS Division, SLC, ISO 9001:2015 and AS9100D in Accordance With AS9104/1
Seal Storage and Handling Guide - Linear Fluid Power Seals
Shelf Life for Elastomeric Seals
EPS-Tech-Tip-Typical Sealing Systems in Common Linear Fluid Power Devices
How They Work - Lip Shape Effects on Linear Seal Profiles
Piston Seal Decision Tree
Rod and Buffer Seal Decision Tree
Parker's Sealing and Shielding blog
Description
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AVAILABILITY: A sampling of Parker’s part numbers are shown in the configurator above for select materials and sizes. If the material and dimensions required are not shown, assistance with part number configuration may be found in the literature documents in the Product Support tab. To check current tooling, review the Part Number Look-up document. Contact Parker for requirements outside typical ranges.
Parker's Deep PolyPak® (DPP Profile) is a symmetrical profile squeeze seal for use in either rod or piston applications. Its rectangular shape ensures stability in the gland. The standard Molythane® shell provides high wear resistance and the O-ring energizer functions as a spring to maintain sealing contact under low pressure or vacuum applications.
The DPP Profile PolyPak seal's scraper lip design cuts fluid film and moves contamination away from the seal. The sharp edge of the lip is formed by a precision knife trimming process during manufacture.
A wide selection of sizes and alternate compounds allow this profile to match up with many hydraulic applications. The DPP Profile PolyPak seal is an economical choice as a stand-alone rod or piston seal. DPP Profile seals should not be installed back-to-back in bi-directional piston applications as a pressure trap between the seals may occur.
Standard Materials (Shell or Seal Body):
• P4615A90 Molythane®; Temp -65 / +200F; Pressure* 5000 psi; Surface speed <1.6 ft/s
• P4622A90 Ultrathane®; Temp -65 / +225F; Pressure* 5000 psi; Surface speed <1.6 ft/s
• Z4651D60 PolyMyte®; Temp -65 / +275F; Pressure* 7000 psi; Surface speed <1.6 ft/s
• N4263A90 Nitroxile®; Temp -20 / +275F; Pressure* 2000 psi; Surface speed <1.6 ft/s
• E4207A90 Ethylene Propylene; Temp -65 / +300F; Pressure* 2000 psi; Surface speed <1.6 ft/s
• V4266A95 FKM; Temp -5 / +400F; Pressure* 2250 psi; Surface speed <1.6 ft/s
• V4208A90 FKM; Temp -5 / +400F; Pressure* 2000 psi; Surface speed <1.6 ft/s
• N4007A95 HNBR; Temp -20 / +320F; Pressure* 2500 psi; Surface speed <1.6 ft/s
Please note: Pressure ratings shown are for predominantly dynamic applications. Where the application is predominantly static, as is typical in Oil & Gas applications, maximum pressure ratings may be extended by a factor of 2 to 3 (or greater), assuming nominal extrusion gap and operating temperature within limits. For assistance, please contact Parker’s application engineering team.
*Pressure ranges shown are for systems without wear rings. If using wear rings, please consult Engineering Section (Section 2) of Parker's Fluid Power Seal Design Guide, Catalog EPS5370.
Energizer Spring Element Materials:
• For seals with 4615 or 4622 PolyPak shell, the standard spring energizer is a nitrile o-ring
• For seals with 4651 PolyPak seal body, the O-spring energizer code must be specified. The standard code is "N" for nitrile o-ring
• For seals with rubber PolyPak seal body, standard spring energizer is an o-ring from the same rubber material family as the seal body.
Alternate Materials: For applications that may require an alternate material, please contact your Parker EPS representative.
Description
Performance Characteristics
Maximum Operating Pressure
2000 to 7000 psi
Minimum Operating Temperature
-65 °F
Maximum Operating Temperature
400 °F
Body Material
FKM
TPU
TPCE
EPDM
XNBR
HNBR
Spring Material
FKM
NBR
EPR
For Fluid Type
Broad Range
Oil
Water
Steam
Color
Black
Orange
Yellow
Durometer
75 to 95 Shore A
60 Shore D
Thermal Application Type
Varies (depending on material)
Polymer Material Options
Fluorocarbon Rubber (FKM, FPM)
Thermoplastic Polyurethane (TPU, Resilon®, Ultrathan®)
Thermoplastic Copolyester Elastomer (TPC, TPE)
Ethylene Propylene Rubber (EPM, EPR, EPDM)
Nitrile Butadiene Rubber (NBR, XNBR)
Hydrogenated Nitrile Butadiene Rubber (HNBR, HSN)
Specifications Met
Varies (depending on material)
Includes API 6A (FF/HH) (10% Sour Gas)
Media
Hydraulic
Unit of Measure
Length: inch
Maximum Surface Speed
100 ft/min
0.5 m/sec
FAILURE OR IMPROPER SELECTION OR IMPROPER USE OF THE PRODUCTS DESCRIBED HEREIN OR RELATED ITEMS CAN CAUSE DEATH, PERSONAL INJURY AND PROPERTY DAMAGE. This document and other information from Parker-Hannifin Corporation, its subsidiaries and authorized distributors provide product or system options for further investigation by users having technical expertise. The user, through its own analysis and testing, is solely responsible for making the final selection of the system and components and assuring that all performance, endurance, maintenance, safety and warning requirements of the application are met. The user must analyze all aspects of the application, follow applicable industry standards, and follow the information concerning the product in the current product catalog and in any other materials provided from Parker or its subsidiaries or authorized distributors. To the extent that Parker or its subsidiaries or authorized distributors provide component or system options based upon data or specifications provided by the user, the user is responsible for determining that such data and specifications are suitable and sufficient for all applications and reasonably foreseeable uses of the components or systems...
