BSP Female Multiseal Fitting: 22111 Series

Why This BSP Female Multiseal Fitting Passes the Compliance Gate

A BSP female multiseal fitting joins a braided hydraulic hose to a BSPP spherical seat connection: a swivel nut with an internal parallel G thread pulls the fitting’s spherical sealing face onto the 60° cone of the mating stud, and the two metal faces seal without an O-ring. The 22111 series from HENGHUA covers 21 part numbers from -02 to -32 with G-series parallel threads from G1/8″ to G2″. Every unit is cold-forged from carbon steel, heat-treated, plated, and 100% pressure tested before shipment. For OEM buyers this fitting is a compliance gate; for maintenance teams it is the multiseal termination that self-centres on the male cone, which makes assembly forgiving in awkward positions.

• Spherical seat multiseal geometry: the fitting presents a machined spherical (ball-shaped) sealing face that seats metal-to-metal against the 60° cone of the mating male stud. The sphere-cone contact self-aligns as the nut is tightened, so a slightly off-axis approach still seals.
• BSPP G thread: the thread is parallel (G series, ISO 228-1) and only holds the connection; the spherical seat does the sealing. G threads must never be interchanged with BSPT taper threads, which seal by thread interference.
• Swivel nut design: the drawing shows a single hexagon, S2, on the swivel nut; the nut is captive on the body and rotates freely, so the hose can be oriented before final torque and is never twisted by the connection.
• Braided hose executions: the part numbers in the table are for braided hose from -02 to -32; for spiral hose, change the series number to 22112 per the factory sheet.
• OEM gate check: full dimensional and material conformance with G thread form per ISO 228-1, with material test reports (MTR) available for every batch.

Core Advantages

1. Self-aligning spherical seat: the sphere-cone seal centres itself as you tighten, which tolerates the small misalignments that happen on real machines and keeps the joint leak-free.
2. No soft seal element: the metal-to-metal spherical seat has no washer or O-ring to age, harden, or replace, which removes a service part from your inventory.
3. Twenty-one sizes, G1/8″ to G2″: from -02 instrumentation lines to -32 main lines, with T and W tail variants for different hose constructions.
4. Swivel nut, no hose twist: the nut turns independently on the body, so the hose keeps its natural lay and the assembly is not wound up when you tighten the connection.
5. 96 to 1000 h salt spray options: trivalent zinc (96 h), zinc-nickel (720 h), or Dacromet (1000 h), matched to your environment.

Technical Specifications

What Is This BSP Female Multiseal Fitting?

This BSP female multiseal fitting terminates a braided hose with the BSPP spherical seat connection. The port end is a swivel nut carrying a parallel G thread (G series, thread form per ISO 228-1). Inside the nut, the fitting body ends in a machined spherical face. When the nut is tightened onto a male G-threaded stud whose end carries a 60° cone, the sphere settles into the cone and the two metal faces meet in a line of contact that forms the seal. The G thread is parallel and does not seal by interference; it only pulls the faces together. This is why a spherical seat connection must never be paired with a BSPT taper thread, which seals by thread interference instead.

The spherical seat is the self-aligning member of the BSP sealing family. Where a flat seat needs a washer or O-ring between two flat faces, and a 60° cone version seals cone-to-cone or cone-to-O-ring, the spherical seat seals metal-to-metal between a ball-shaped face and a cone. Because the sphere finds its own centre in the cone as the nut is tightened, the joint tolerates small angular misalignment between the hose end and the port, which is common on vibrating machines and in tight routing. There is no elastomer in the pressure path, so there is no soft element to age or replace, and the seal does not degrade with temperature the way a rubber element does.

The 22111 is the straight member of the BSP multiseal hose fitting family, complementing the 22141 (45°) and 22191 (90°) elbows on the same spherical seat geometry. The series covers 21 sizes from -02 to -32; the part numbers in the table are for braided hose, and for spiral hose the series number changes to 22112. Rows marked T and W carry tail-profile variants for different hose constructions; keep the suffix in the part number when ordering.

Dimensional Data and Threads

Full dimension drawings with A, C, and S2 callouts are supplied as PDF and CAD (STEP/DWG) files. Because this is a crimp fitting, the two process-critical parameters are the hose insert depth and the crimp outside diameter; both are hose-series specific and are listed in the crimp data sheet that accompanies every order.

Full Dimension Table (Part Number Matrix) {#by-thread-size}

Read the table with your BSPP thread (E) and your hose size (dash). The part number is the order code; copy it directly into your inquiry or purchase order. The pattern is 22111-[thread dash]-[hose dash]: for example, 22111-12-12 has a G3/4″ thread and suits a -12 (20 mm) braided hose.

The part numbers shown are for the braided-hose version. For spiral hose, change the series number to 22112, whose stem is longer for the extra reinforcement layers.

Select by Hose Dash Size {#by-hose-size}

Match your hose bore first, then read the thread sizes available for that bore:

Material and Heat Treatment

Cold forging preserves the grain flow of the steel, which raises fatigue resistance under pressure pulsation. Each heat-treatment batch is hardness-tested and recorded, so the hardness number on the MTR matches the parts you receive.

Working Pressure

The exact rating for your part number and hose combination is confirmed on the datasheet and by our engineers before shipment.

Pressure-Temperature Operating Envelope

The steel spherical seat and body hold full rated pressure across the whole temperature window. Because there is no elastomer in the sealing path, the fitting is not the temperature-limiting part of the assembly; the hose and any elastomer seals elsewhere in the system set the practical envelope.

Selection and Ordering

The 22111 BSP female multiseal fitting series covers the straight segment of BSP hydraulic hose fittings for spherical seat connections, from -02 to -32, so most orders can be placed directly from the table above.

BSPP Thread Size Chart

Use this chart to identify the thread on your port. BSPP G threads are parallel; they are identified by measuring the thread outside diameter and counting the threads per inch.

Cross Reference Service {#by-oem-part-number}

Most maintenance teams buy against a legacy part number printed on the old drawing. Send us the OEM or distributor part number you currently use, with a photo of the fitting if possible. Our engineers identify the thread, the seat geometry, the hose size, and the body configuration, then confirm the exact 22111 equivalent before you place the order. The service covers multiseal fittings, BSP hydraulic hose fittings, and BSPP elbows in your inventory, and interchange confirmation is free. The cross reference sheet is returned in PDF for your records.

Packaging and Logistics

Assembly and Use Guide

Four-Step Crimping Procedure

1. Cut the hose square: use a hose cutter, never a hacksaw or an angle grinder. A square, clean end is the precondition for a uniform ferrule grip.
2. Mark the insert depth: read the insert depth for your hose series from the crimp data sheet and mark the line on the hose cover.
3. Lubricate and insert: apply a thin film of assembly lubricant to the stem and the hose bore, then push the fitting into the hose until the mark meets the ferrule.
4. Crimp and verify: select the die per the crimp table, crimp in one continuous stroke, then measure the crimp outside diameter with a caliper and compare with the tolerance.

Connecting the Spherical Seat End

On the BSP female multiseal fitting, clean the spherical sealing face and the 60° cone of the mating stud with a lint-free cloth. Screw the swivel nut onto the male G-threaded stud by hand until the faces touch, then tighten to the torque listed for the thread size, wrenching the S2 nut hex. The sphere self-centres in the cone as you tighten, so a small angular offset between the hose and the port is absorbed by the joint. The metal-to-metal spherical contact does the sealing, so no sealant is used. The nut swivels on the body, so position the hose routing first and tighten last; the hose will not be twisted by the connection.

Installation Warnings

• ❌ Never mix fittings and ferrules from different suppliers, even when the thread and hose sizes look identical. Stem geometry, ferrule hardness, and crimp parameters differ, and a mixed joint will leak or blow off under pressure.
• ❌ Never confuse G (BSPP parallel) threads with R (BSPT taper) threads. A G thread with a spherical seat seals by face contact; a taper thread seals by thread interference and needs sealant. The two are not interchangeable.
• ❌ Never match a spherical seat fitting to a scratched or pitted male cone. The metal-to-metal seal needs an undamaged sealing surface on both sides; replace the male part if its cone is damaged.
• ❌ Never crimp without the matching crimp data sheet. An under-crimped joint weeps, and an over-crimped joint damages the hose reinforcement.
• ❌ Never recrimp a fitting after a failed attempt, and never reuse a fitting removed from a hose.
• ✔ After assembly, pressure-test the circuit at 1.5x working pressure and inspect all joints for weepage.

OEM Customization and Quality Traceability

Customization Options

• Size and thread customization: non-standard G thread and hose combinations and special stem lengths machined to your drawing.
• Surface treatment customization: trivalent zinc (96 h), zinc-nickel (720 h), or Dacromet (1000 h) salt spray grades, selected by your environment and corrosion specification.
• Laser marking: your logo, part number, and batch code laser-marked on the hex for full field traceability.
• Material options: 304/316L stainless for chemical, marine, and food-contact circuits, with passivation certificates.

Quality and Traceability System

Every batch follows a documented flow: incoming steel with mill certificate → cold forging → CNC machining → heat treatment → plating → 100% thread gauge and dimension inspection → pressure test → laser marking → packing. The batch number on the carton links back to the raw material lot, the heat-treatment record, and the inspection report. Material test reports (MTR) are provided with every order on request, and third-party inspection reports (BV/SGS) can be arranged before shipment.

FAQ

Q: What is a BSP female multiseal fitting? A: It is a crimp-on fitting for braided hose whose port end is a swivel nut with a BSPP internal G thread (ISO 228-1); the body ends in a machined spherical sealing face that seats metal-to-metal against the 60° cone of a male G-threaded stud.

Q: How does the spherical seat seal? A: When the nut is tightened, the sphere settles into the mating 60° cone and the two metal faces meet in a line of contact that forms the seal. There is no washer or O-ring in the sealing path.

Q: What is the difference between multiseal, flat seat, and 60° cone fittings? A: Flat seat fittings seal with a washer or O-ring between two flat faces. 60° cone fittings seal on machined cone faces, metal-to-metal or with an O-ring on the cone. Multiseal fittings seal a spherical face into a cone, which self-aligns during tightening and has no soft element to replace.

Q: Why is the spherical seat called self-aligning? A: The sphere finds its own centre in the cone as the nut is tightened, so a small angular offset between the hose end and the port is absorbed. That makes assembly forgiving in tight or vibrating installations.

Q: Which hoses work with the 22111 series? A: The part numbers in the table are for braided hose from -02 to -32 (DN 5 to DN 50). For spiral hose, change the series number to 22112. Confirm your exact hose construction with our engineers, and the matching crimp data sheet will be supplied with the order.

Q: What is the difference between the 22111 and the 22141/22191 elbows? A: The 22111 is a straight termination: the hose approaches the port in line with the port axis. The 22141 (45°) and 22191 (90°) are elbows that turn the hose when the port axis and the hose run are not in line. All three use the same BSPP spherical seat geometry.

Q: Can you provide crimp data for my hose? A: Yes. Every order includes the crimp data sheet for your hose construction, with insert depth, crimp outside diameter, and die selection. Send us your hose series and brand, and our engineers will confirm the crimp parameters before shipment.

Request a Quote

Tell us the BSPP thread, the hose dash size, the hose construction, and the annual quantity. Whether you need stock BSP hydraulic hose fittings for distribution or a custom multiseal fitting for an OEM program, the quoting process is the same. For replacement orders, send the legacy part number and a photo, and our engineers will confirm the interchange before quoting. Every BSP female multiseal fitting leaves the HENGHUA factory pressure-tested, batch-coded, and backed by a written warranty. Request your quote, crimp data sheet, or drawing pack today, and we will respond within 24 hours.