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Model HP - NFPA High Pressure Hydraulic Cylinders |
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"Selecting the Correct Port Type" |
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The National Fluid Power Association (NFPA) has established standard port sizes for hydraulic cylinders to go along with standardized bore sizes.
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Cylinder ports are threaded holes that can be located on any of the four cylinder end cover side locations. The port contains standard thread dimensions to accept hydraulic fittings (used to introduce hydraulic fluid into the cylinder) commonly found in industrial applications throughout North America and elsewhere around the world. A port may be located on any side of the cylinder head and cap end covers. Hydraulic supply ports may be occasionally be oversized; however, when this occurs, the cylinder becomes "Non-NFPA Standard" and is generally not NFPA interchangeable when compared to other NFPA cylinders. Oversized Ports are not configurable herein.
When selecting Port Locations for Double Rod End Cylinders, please contact Peninsular. |
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Illustration #1: NPT Ports and SAE O-Ring Ports - are the most commonly used Standard Hydraulic Supply Ports |
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NPT Ports - Have Tapered Threads |
SAE O-ring Ports - Have Parallel Straight Threads |
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Illustration #2: NPT Ports - High Pressure Hydraulic Standard NPT Supply Port illustration and Dimensional Data |
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NPT Ports - Have Tapered Threads |
Dimensional Data for NFPA Standard NPT Ports
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Illustration #3: SAE O-ring Ports - High Pressure Hydraulic Standard SAE O-ring Supply Port illustration & Dimensional Data |
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SAE O-ring Ports - Have Parallel Straight Threads |
Dimensional Data for NFPA Standard SAE O-ring Ports
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Illustration #4: Oversized NPT Ports & SAE O-Ring Ports Note: Port Bosses are Required for Oversized Ports |
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Very few applications may require a larger port than the stated NFPA standard port size. When oversized ports are ordered, a “Port Boss” is welded to the cylinder head to accommodate the larger supply port. Oversized NPT Port Sizes are available by special request and are not configurable within this configurator. NPT Oversized Port dimensions containing bosses are referenced below. When oversized ports are required, contact Peninsular at Toll Free (800) 526-7968 in the USA or Canada or at (586) 775-7211. You may also email us at sales@peninsularcylinders.com.
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Chart listing Oversized NPT & SAE O-ring Port Size Dimensions Informational Data Only - Oversized Ports are not configurable herein
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Illustration #5: Selecting End Cap Hydraulic Supply Port Locations |
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The purpose of this configurator screen is to identify the “Head End” (Front End Cap) and "Cap End" (Rear End Cap) side locations that require hydraulic supply ports. A hydraulic supply port may be located on any one, two, three or four of the four sides of the square end cover of the cylinder that is not resticted by the cylinder mount. When selecting the port location, one must always view the cylinder through the front of the “Head End” (also referred to as the "Rod End") even when selecting the port location on the "Cap End". The illustrations below provide an explanation on how to view the cylinder for making the port location(s) decision. When selecting Port Locations for Double Rod End Cylinders, please contact Peninsular. |
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End Cap Hydraulic Supply Port Location Charts |
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| End Cap Side Positions |
View of a Side Foot Lug Mounting Style cylinder (MS2) showing both the Front & Rear End Caps with Hydraulic Supply Ports at Positions #1.
Arrows are pointing to the End Cap Side Locations |
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For any cylinder mount, always view the Cylinder through the Front End Cap when determining the Hydraulic Supply Port location(s) for both the Front and Rear End Caps. |
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If you need any assistance please feel free to call us toll free at (800) 526-7968 in the USA or Canada or at (586) 775-7211. You may also e-mail us at sales@peninsularcylinders.com.
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Toll Free: 800-526-7968 Phone: (586)
775-7211 Fax: (586) 775-4545 |