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Hydraulic Flanges and Components and Dual Seal Flanges
Hydraulic Flanges and Components and Dual Seal Flanges
Hydraulic Flanges and Components and Dual Seal Flanges
4300 Catalog Hydraulic Flanges and Components and Dual Seal Flanges Dimensions and pressures for reference only, subject to change.
The 4-bolt flange connections conforming to SAE J518 and ISO 6162-1 and -2 are proven, leak-free connections, especially suited for larger sizes, higher pressures and assembly in tight quarters. Threaded port connections such as SAE straight thread O-ring and ISO 6149 are reasonably easy to assemble and provide 6000 psi and higher pressure capability up to size 12 (M27). Beyond this size the pressure rating starts to decrease and assembly torques increase rapidly. The 4-bolt flange port connections provide ability to connect larger sizes and achieve higher-pressure capability at reasonable assembly torques. Be-cause of the lower assembly torques compared to an equivalent size threaded port, these connections are well suited for tight quarters where wrench clearances are limited. Parker 4-bolt flange products described in this part of the catalog provide various means of connecting tubes, hoses, pipes and threaded fittings to 4-bolt flange ports. The discussion below provides an overview of some of the available flange products.
Parker 4-bolt flange products are designed to provide different methods of connecting a tube, hose, pipe or another fitting to the SAE standard 4-bolt flange port.
Flange Fittings — All Parker flange fittings, except for those with square mounting hole patterns (nomenclature code QS), are designed to conform to O-ring groove, bolt holes and bolt pattern dimensions of either Code 61 or Code 62 of SAE J518 and ISO 6162-1 (Code 61) or -2 (Code 62). The flange adapters (Code Q1 and Q2), and flange block fittings (Codes Q1B, Q2B and QSB) have O-ring grooves conforming to dimensions in SAE J518. The flange block fittings (Codes Q1B and Q2B) have through holes for the mounting bolts, again conforming to SAE J518. There is no industry standard for the bolt pattern of the square pattern block flanges with codes QSP and QSB. The flange pad fittings (Codes Q1P, Q2P, and QSP) have a flat face (no O-ring groove) and the mounting holes are tapped. Where these fittings are used, the seal is in the mating part (flange adapter, flange hose fitting, flange block fitting, etc.)
Flange Clamps — Clamps are used for providing the holding power to the 4-bolt flange connection. They are offered in split and captive (one-piece) versions. The captive version is also of-fered with either drilled or tapped bolt holes. The captive flange clamp with tapped holes is used while connecting a tube to another tube or a hose. Parker flange clamps are forged for higher strength and durability. They meet all requirements of SAE J518. The split clamps make it easy to assemble the connection in close quarters. They also make removal of the flange head component, such as a hose assembly, easy by loosening all four bolts and removing one clamp half.
Junction Block Tees — These are solid block union fittings to connect two tube/hose assemblies using 4-bolt flange connec-tion, at a junction, to SAE 4-bolt flange port, or three tube/hose assemblies to each other.
Connector Plate — Connector plate is used as a middle plate to connect two flange heads with O-ring grooves, such as two hose assemblies with flange connection ends. The flat surface of the plate provides sealing surface on each side for the O-ring housed in the hose ends.
Spacer Plate — Spacer plate provides access to the system fluid via the gage port on the side. The plate is between the flange connection to provide this access.
Plugs — Plugs provide a means to block off the 4-bolt flange port with and without clamps, and to plug the end of a pipe (via welding).
Tank Weld Adapter — Tank weld adapters provide a means of flange connection to a fabricated reservoir or tank. Dimensions other than the O-ring groove, bolt holes, bolt pat-tern, and the flange foot print (for codes Q1B and Q2B only) are not governed by any industry standard. However, Parker product design follows common industry practice and sound engineering.
Hydraulic Flanges Steel Stainless Steel ASTM Type ASTM Type 4-Bolt Flanges A108 C1020 A240 316L Flange Clamps A108 C1045 A351 / A743 Nitronic 50 HHCS Bolts SAE Grade 8 ——SHCS Bolts ——A240 316
4300 Catalog Hydraulic Flanges and Components and Dual Seal Flanges Dimensions and pressures for reference only, subject to change.
The four-bolt flange connection (SAE J518) is a proven leak-free connection, especially suited for larger sizes. As a result, it has achieved worldwide acceptance. The connection’s success is in its simplicity. It is a static face seal using a high durometer O-ring for the seal and clamps and bolts for holding power. Alternatively, a bonded seal plate is between the port face and the flat face of a mechanically formed (flanged with Parflange ® process) tube as shown in Fig. L4 to achieve the same results. The (O-ring) seal is compressed between the bottom of the groove in the flange head and the flat surface of the port or flange pad, providing a reliable soft seal. The alternate seal plate has a high durometer bonded rubber seal on the inside edge, which compresses between the two flat surfaces, providing a soft seal with the same reliability. A metal-to-metal contact at the outer face of the flange with the port face keeps the seal from extruding under pressure. This metal-to-metal contact is maintained by the clamping force provided by tightening the bolts via the clamps. This simple design provides several advantages over threaded port connections, such as NPTF, SAE, BSPP, ISO 6149, etc., in larger sizes:
• Ability to connect up to 5 inch O.D tube (Code 61 only) • Much lower tightening torque required from the four bolts compared to that required for equivalent size threaded port • Less tightening torque means smaller wrenches and wrench swing clearances — providing ease of as-sembly in tight quarters • Up to 6000 psi capability through 2” size (Code 62 only) • Single seal point between tube/pipe/hose assembly and the port • Ease of disassembly through use of split clamps
The connection has one disadvantage — it requires a larger area (foot print) on the component than an equivalent threaded port.
Please refer to Section S for the assembly and installation instructions for Hydraulic Flanges and Components fittings.
Feature Advantage Benefit Conform to SAE J518 and ISO 6162 Controls dimensions and tolerances of code 61 and 62 port connections Insures interchangeability and consistency Forged Construction Reliable, long life performance No downtime, reduced costs Compact envelope size, no sharp edges Reduced weight Over 60 Configurations Flexibility in plumbing, match system needs Best solution and best value Parflange Technology Designed to be used with Code 61/62 fittings Eliminates messy and time consuming brazing process Mounting Hardware Grade 8 bolts standard Performs in rigorous applications for the life of the flange Flange Kits Flange with hardware for mounting (o-ring, bolts and lockwashers) Reduces order and assembly error
4300 Catalog Hydraulic Flanges and Components and Dual Seal Flanges Dimensions and pressures for reference only, subject to change.
Parker’s Dual Seal Flange Adapter product line provides a solution for high vibration, high shock hydraulic four bolt con-nection styles used in various applications. This Parker inno-vation is offered as an alternative to traditional ISO 6121 (SAE J518) Code 62 Flange connections providing improved port retention, increased sealing capability and elimination of costly field replacement due to failure. Dual Seal Flange Adapters incorporate both radial and face seal technologies, reduc-ing the potential for system leakage and ingression of air or water caused by side loading of traditional flange face seal connections. Dual Seal Flange Adapters have a system work-ing pressure rating of 7500 PSI with a 4:1 design fac-tor. The face seal system incorporates Parker’s Captive O-ring Groove technology to prevent o-ring fall out during in-stallation minimizing connection failures seen with traditional flange connections.
The Dual Seal Flange adapter consists of three components: a body, a face sealing O-ring and a radial sealing O-ring. The body is manufactured from Heat Code Traceable 316 stain-less steel and the O-rings are manufactured from 90 durom-eter Nitrile. Additional components used for assembly of the Dual Seal Flange adapters include four bolts, flange clamps and lock washers. Flange clamps are available from Parker Tube Fittings Division, with standard sizes listed on Page L9 of this catalog section.
The Dual Seal Flange Adapter Body
Dual Seal Flange Adapters bodies are manufactured in ½”, 1” and 1 ½” sizes with ten different cold drawn tube, pipe or hose end configurations available as standard. Straight bodies are machined from 316/316L bar stock.
Dual Seal Flange Clamps
Flange clamps are offered in both split and captive (one-piece) versions depending on the adapter configuration being used. Flange clamps are machined from 316/316L materials. For all straight Dual Seal Flange Adapter bodies split flange clamp are required. The 90° and 45° cast shaped versions can be installed with either split or captive flange clamps.
Dual Seal Flange Adapters are designed to conform to bolt thread and bolt pattern dimensions of ISO 6162-2 or SAE J518 Code 62. Materials used in the manufacture of Parker Dual Seal Flange Adapters are compliant to NACE MR0175. All products are Heat Code Traceable and have been tested to SAE require-ments.
As shown below, Dual Seal Flange connections use both a radial seal and face seal to achieve superior leak free port connection. The primary radial seal (A) improves the pressure capabilities of this adapter to 7500 PSI while offering addition-al system integrity. The face seal (B) provides resistance of external pressures introduced by the application environment. The flange clamps (C) and bolts (D) are used to compress the o-rings into the port and provide the clamping force necessary.
Tube Fittings Division Columbus, Ohio 4300 Catalog Hydraulic Flanges and Components and Dual Seal Flanges Dimensions and pressures for reference only, subject to change.
Improved Pressure Rating: Parker’s new Dual Seal design is rated for up to 7500 PSI to meet current and future hydraulic design needs. This design has also been tested to meet stan-dard SAE J1644 parameters.
Captive O-ring Groove: The design of Parker’s Dual Seal Flange Adapters incorporates a captive O-ring groove (CORG) which prevents O-ring fall out during installation further pre-venting the possibility of leaks.
Radial Seal: The primary radial seal (A) improves the pres-sure capabilities of the Dual Seal system to 7500 PSI while offering additional system integrity.
Ingression Seal: Reduces the potential for side loading and ultimately connection failure in high impulse and high vibration applications.
Multiple Standard Configurations: Parker’s Dual Seal Flange Adapter product line includes a variety of tube, pipe, and hose connection styles to meet hydraulic system design needs. Included are Parker’s Seal-Lok (SAE J1453), Triple-Lok (SAE J514), SAE ORB (SAE J1926) and NPTF for tradi-tional hydraulic connections. In addition, to offer a solution for schedule pipe assemblies, Parker offers socket weld configu-rations.
Tube Fittings Division Columbus, Ohio 4300 Catalog Hydraulic Flanges and Components and Dual Seal Flanges Dimensions and pressures for reference only, subject to change.
Code 61/62 Flange Clamp, Captive
Code 61/62 Flange Clamps, Split
To order a flange clamp split kit, insert a “K” after the material designator in the Tube Fitting part number. The Kit includes two flange clamp halves, 4 HHCS bolts, 4 lock washers and an O-ring.
Tube Fittings Division Columbus, Ohio 4300 Catalog Hydraulic Flanges and Components and Dual Seal Flanges Dimensions and pressures for reference only, subject to change.
Flange Components Temperature range without pressure reductions for fittings with O-ring sealing of NBR (e.g., buna N series) -35°C up to +100°C, FPM (e.g., fluorocarbon on request) -25°C up to +120°C. Tightening torques for socket head cap screws see Table S6. * Does not meet ISO 6162 specification. Note: Clamp halves are sold separately, not as a set.
For Straights and Elbows (ISO 6162-1, Type 1)
Tube Fittings Division Columbus, Ohio 4300 Catalog Hydraulic Flanges and Components and Dual Seal Flanges Dimensions and pressures for reference only, subject to change.
Flange Components Temperature range without pressure reductions for fittings with O-ring sealing of NBR (e.g., buna N series) -35° up to +100°C, FPM (e.g., fluorocarbon on request) -25° up to +120°C. Tightening torques for socket head cap screws see Table S7. * Does not meet ISO 6162 specification. Note: Clamp halves are sold separately, not as a set.
For Straights and Elbows (ISO 6162-2, Type 1)
Tube Fittings Division Columbus, Ohio 4300 Catalog Hydraulic Flanges and Components and Dual Seal Flanges Dimensions and pressures for reference only, subject to change.
Code 61 Connector Code 61 / Flareless
Code 61 Flange Connector Code 61 / ORFS
Code 62 Flange Connector Code 62 / ORFS * Y – Across Wrench Flats * Y – Across Wrench Flats
Code 61 Flange Connector Code 61 / 37° Flare
Code 62 Flange Connector Code 62 / 37° Flare * Y – Across Wrench Flats * Y – Across Wrench Flats
Tube Fittings Division Columbus, Ohio 4300 Catalog Hydraulic Flanges and Components and Dual Seal Flanges Dimensions and pressures for reference only, subject to change.
Code 61 Connector Code 61 / SAE-ORB * Y – Across Wrench Flats
Code 62 Connector Code 62 / SAE-ORB * Y – Across Wrench Flats
Braze Flange Head Connector, Tube Tube Braze Socket* / Code 61/62 Flange Head
* For clearance brazing
O-ring Face Flat Face
Tube Fittings Division Columbus, Ohio 4300 Catalog Hydraulic Flanges and Components and Dual Seal Flanges Dimensions and pressures for reference only, subject to change.
EO-2 Part Number example: GFS33/18ZLCF
Temperature range without pressure reductions for fittings with O-ring sealing of NBR (e.g., buna N series) -35°C up to +100°C, FPM (e.g., fluorocarbon on request) -25°C up to +120°C. Tightening torques for socket head cap screws see Tables S6 and S7.
SAE Flange Connector – Standard Series Code 61 & 62 / Metric Flareless
Tube Fittings Division Columbus, Ohio 4300 Catalog Hydraulic Flanges and Components and Dual Seal Flanges Dimensions and pressures for reference only, subject to change.
DIN Flange / Metric Flareless Tube connection according to DIN 2353
EO-2 Part Number example: BFG15ZL/LK40CF
Temperature range without pressure reductions for fittings with O-ring sealing of NBR (e.g., buna N series) -35°C up to +100°C, FPM (e.g., fluorocarbon on request) -25°C up to 120°C. Tightening torques for socket head cap screws see Table S6.
Flange Head Plug Code 61/62 Flange Head Plug O-ring Face Flat Face
Tube Fittings Division Columbus, Ohio 4300 Catalog Hydraulic Flanges and Components and Dual Seal Flanges Dimensions and pressures for reference only, subject to change.
Weld Socket Flange Connector, Pipe Extended Weld Socket, Pipe / Code 61 or 62 Flange Head
Threaded Port Flange Adapter NPTF or SAE Port / Code 61 Flange Head
Tube Fittings Division Columbus, Ohio 4300 Catalog Hydraulic Flanges and Components and Dual Seal Flanges Dimensions and pressures for reference only, subject to change.
Code 61 Weld Butt Flange
Connector, Pipe Schedule 40, 80 or 160 Weld Butt / Code 61 Flange Head O-ring Face Flat Face
Code 62 Weld Butt Flange
Connector, Pipe Schedule 80, 160 or XXS Weld Butt / Code 62 Flange Head
Tube Fittings Division Columbus, Ohio 4300 Catalog Hydraulic Flanges and Components and Dual Seal Flanges Dimensions and pressures for reference only, subject to change.
Code 61 Weld Butt Tank Adapter Weld Butt with Pilot / Code 61 Block Flange Pad * Identical types. Temperature range without pressure reductions for fittings with O-ring sealing of NBR (e.g., buna N series) -35°C up to +100°C, FPM (e.g., fluorocarbon on request) -25°C up to +120°C. Tightening torques for socket head cap screws see Tables S6 and S7.
SAE-Flange / Weld Butt For metric tube welded connection
Tube Fittings Division Columbus, Ohio 4300 Catalog Hydraulic Flanges and Components and Dual Seal Flanges Dimensions and pressures for reference only, subject to change.
Code 61 Weld Saddle Block Connector Pipe or Tube Weld Saddle / Code 61 Block Flange or Pad Flat Face O-ring Face
NPTF Port Square Block Flange Adapter NPTF Port / Square Block Flange or Pad Flat Face O-ring Face
Tube Fittings Division Columbus, Ohio 4300 Catalog Hydraulic Flanges and Components and Dual Seal Flanges Dimensions and pressures for reference only, subject to change.
Block Plug Code 61/62 Block Flange or Pad Plug Flat Face O-ring Face 1) See page L40 for standard stainless steel sizes and dimensions.
2) SAE J518 does not cover these sizes in Code 62. Bolt hole centerline dimensions are: 2.312” x 4.875” for 4OPQ2 and 2.812” x 6.000” for 48PQ2. To receive mounting hardware with flange, insert a “K” after the material designator. Mounting hardware kits are available for O-ring Face part numbers and include 4 bolts, 4 lock washers and an O-ring.
Weld Socket Square Block Connector, Pipe Pipe Weld Socket / Square Block Flange or Pad Flat Face O-ring Face
To receive mounting hardware with flange, insert a “K” after the material designator. Mounting hardware kits are available for O-ring Face part numbers and include 4 bolts, 4 lock washers and an O-ring.
Tube Fittings Division Columbus, Ohio 4300 Catalog Hydraulic Flanges and Components and Dual Seal Flanges Dimensions and pressures for reference only, subject to change.
Flange Spacer with Gage Ports Code 61/62 Spacer with Side Gage Ports
Flange Connector Plate Code 61/62 Flange Connector Plate
Tube Fittings Division Columbus, Ohio 4300 Catalog Hydraulic Flanges and Components and Dual Seal Flanges Dimensions and pressures for reference only, subject to change.
Code 61 Flange 45° Elbow Code 61 / ORFS * Y – Across Wrench Flats
Code 62 Flange 45° Elbow Code 62 / ORFS * Y – Across Wrench Flats
Code 61 Flange 45° Elbow Code 61 / 37° Flare * Y – Across Wrench Flats
Code 62 Flange 45° Elbow Code 62 / 37° Flare * Y – Across Wrench Flats
Code 61 45° Elbow Code 61 / Flareless * Y – Across Wrench Flats
Tube Fittings Division Columbus, Ohio 4300 Catalog Hydraulic Flanges and Components and Dual Seal Flanges Dimensions and pressures for reference only, subject to change.
Code 61 Flange 90° Elbow Code 61 / ORFS * Y – Across Wrench Flats
Code 62 Flange 90° Elbow Code 62 / ORFS * Y – Across Wrench Flats
Code 61 Flange 90° Elbow Code 61 / 37° Flare * Y – Across Wrench Flats
Code 62 Flange 90° Elbow Code 62 / 37° Flare * Y – Across Wrench Flats
Code 61 90° Elbow Code 61 / Flareless * Y – Across Wrench Flats
Tube Fittings Division Columbus, Ohio 4300 Catalog Hydraulic Flanges and Components and Dual Seal Flanges Dimensions and pressures for reference only, subject to change.
Weld Socket Block Elbow Connector, Pipe Weld Socket, Pipe / Code 61 or 62 Block Flange or Pad Flat Face O-ring Face
To receive mounting hardware with flange, insert a “K” after the material designator. Mounting hardware kits are available for O-ring Face part numbers and include 4 bolts, 4 lock washers and an O-ring.
Tube Fittings Division Columbus, Ohio 4300 Catalog Hydraulic Flanges and Components and Dual Seal Flanges Dimensions and pressures for reference only, subject to change.
SAE Flange Connection Code 61 & 62 / Metric Flareless
EO-2 Part Number example: WFS33/18ZLCF
Temperature range without pressure reductions for fittings with O-ring sealing of NBR (e.g., buna N series) -35°C up to +100°C, FPM (e.g., fluorocarbon on request) -25°C up to +120°C. Tightening torques for socket head cap screws see Tables S6 and S7.
Tube Fittings Division Columbus, Ohio 4300 Catalog Hydraulic Flanges and Components and Dual Seal Flanges Dimensions and pressures for reference only, subject to change.
Hydraulic Flange Elbow DIN Flange / Metric Flareless
EO-2 Part Number example: BFW15ZL/LK40CF
Temperature range without pressure reductions for fittings with O-ring sealing of NBR (e.g., buna N series) -35°C up to +100°C, FPM (e.g., fluorocarbon on request) -25°C up to +120°C. Tightening torques for socket head cap screws see Table S6.
Tube Fittings Division Columbus, Ohio 4300 Catalog Hydraulic Flanges and Components and Dual Seal Flanges Dimensions and pressures for reference only, subject to change.
Block Junction Tee Code 61 or 62 Block Pads / Block Flange or Pad O-ring Face Flat Face
SAE Port Block Elbow SAE Port / Code 61 or 62 Block Flange or Pad O-ring Face Flat Face
To receive mounting hardware with flange, insert a “K” after the material designator. Mounting hardware kits are available for O-ring Face part numbers and include 4 bolts, 4 lock washers and an O-ring.
Tube Fittings Division Columbus, Ohio 4300 Catalog Hydraulic Flanges and Components and Dual Seal Flanges Dimensions and pressures for reference only, subject to change.
NPTF Port Block Elbow Adapter NPTF / Code 61 or 62 Block Flange or Pad
To receive mounting hardware with flange, insert a “K” after the material designator. Mounting hardware kits are available for O-ring Face part numbers and include 4 bolts, 4 lock washers and an O-ring. O-ring Face Flat Face
Tube Fittings Division Columbus, Ohio 4300 Catalog Hydraulic Flanges and Components and Dual Seal Flanges Dimensions and pressures for reference only, subject to change.
Weld Socket Block Elbow Connector, Tube Weld Socket, Tube / Code 61 or 62 Block Flange or Pad O-ring Face Flat Face
To receive mounting hardware with flange, insert a “K” after the material designator. Mounting hardware kits are available for O-ring Face part numbers and include 4 bolts, 4 lock washers and an O-ring.
Tube Fittings Division Columbus, Ohio 4300 Catalog Hydraulic Flanges and Components and Dual Seal Flanges Dimensions and pressures for reference only, subject to change.
Code 61 Weld Butt Block Connector, Pipe Schedule 40, 80 or 160 Weld Butt / Code 61 Block Flange or Pad Flat Face O-ring Face
To receive mounting hardware with flange, insert a “K” after the material designator. Mounting hardware kits are available for O-ring Face part numbers and include 4 bolts, 4 lock washers and an O-ring.
Tube Fittings Division Columbus, Ohio 4300 Catalog Hydraulic Flanges and Components and Dual Seal Flanges Dimensions and pressures for reference only, subject to change.
Code 62 Weld Butt Block Connector, Pipe Schedule 80, 160 or XXS Weld Butt / Code 62 Block Flange or Pad 1) SAE J518 does not cover these sizes in Code 62.
To receive mounting hardware with flange, insert a “K” after the material designator. Mounting hardware kits are available for O-ring Face part numbers and include 4 bolts, 4 lock washers and an O-ring. Flat Face O-ring Face
Tube Fittings Division Columbus, Ohio 4300 Catalog Hydraulic Flanges and Components and Dual Seal Flanges Dimensions and pressures for reference only, subject to change.
Code 61 Weld Saddle Block Connector Pipe or Tube Weld Saddle / Code 61 Block Flange or Pad Flat Face O-ring Face
To receive mounting hardware with flange, insert a “K” after the material designator. Mounting hardware kits are available for O-ring Face part numbers and include 4 bolts, 4 lock washers and an O-ring.
NPTF Port Square Block Flange Adapter NPTF Port / Square Block Flange or Pad Flat Face O-ring Face
To receive mounting hardware with flange, insert a “K” after the material designator. Mounting hardware kits are available for O-ring Face part numbers and include 4 bolts, 4 lock washers and an O-ring.
Tube Fittings Division Columbus, Ohio 4300 Catalog Hydraulic Flanges and Components and Dual Seal Flanges Dimensions and pressures for reference only, subject to change.
Block Plug Code 61/62 Block Flange or Pad Plug
To receive mounting hardware with flange, insert a “K” after the material designator. Mounting hardware kits are available for O-ring Face part numbers and include 4 bolts, 4 lock washers and an O-ring. O-ring Face Flat Face
Weld Socket Square Block Connector, Pipe Pipe Weld Socket / Square Block Flange or Pad Flat Face O-ring Face
To receive mounting hardware with flange, insert a “K” after the material designator. Mounting hardware kits are available for O-ring Face part numbers and include 4 bolts, 4 lock washers and an O-ring.
Tube Fittings Division Columbus, Ohio 4300 Catalog Hydraulic Flanges and Components and Dual Seal Flanges Dimensions and pressures for reference only, subject to change.
Dual Seal Flange Connector Dual Seal / 37° Flare
Dual Seal Flange Connector Dual Seal / ORFS
Dual Seal Flange Connector Dual Seal / Male NPTF
Tube Fittings Division Columbus, Ohio 4300 Catalog Hydraulic Flanges and Components and Dual Seal Flanges Dimensions and pressures for reference only, subject to change.
Dual Seal Flange Connector Dual Seal / Female NPTF
Dual Seal Flange Connector Dual Seal / Male SAE-ORB
Dual Seal Flange Connector Dual Seal / Female SAE-ORB
Tube Fittings Division Columbus, Ohio 4300 Catalog Hydraulic Flanges and Components and Dual Seal Flanges Dimensions and pressures for reference only, subject to change.
Dual Seal Flange Connector Dual Seal / Socket Weld Pipe
Dual Seal Flange Connector Dual Seal Plug
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