BSPP Female/Female Flat Seat Union with PTFE Seal
BSPP Female/Female Flat Seat Union with PTFE Seal designed with BSPP Female × BSPP Female connections for industrial stainless steel threaded piping. Constructed as a three-Piece Flat Seat Union with PTFE Gasket and Central Nut (Investment Cast) in 316 (CF8M) Stainless Steel (with PTFE Flat Seal). Available across nominal sizes 1/8"–2".
Material | 316 (CF8M) Stainless Steel (with PTFE Flat Seal) |
|---|---|
Connection Ends | BSPP Female × BSPP Female |
Body Construction | Three-Piece Flat Seat Union with PTFE Gasket and Central Nut (Investment Cast) |
Nominal Size Range | 1/8"–2" |
Reference Standard | Generally in accordance with ISO 4144 (150 LB series) |
Size
Product overview
Connection Geometry & 316 Stainless Steel Construction
This BSPP female/female flat seat union with PTFE seal features three-piece flat seat union with PTFE gasket and central nut (investment cast) in a straight inline union profile, providing BSPP Female × BSPP Female connections for modular stainless steel piping, equipment hookups, and manifold assemblies. Manufactured in 316 (CF8M) Stainless Steel (with PTFE Flat Seal), the fitting offers molybdenum-bearing austenitic corrosion resistance suited for process water, chemical transfer, utility air, and washdown environments.
Size Coverage & Thread Assembly
Dimensioned generally in accordance with ISO 4144 (150 LB series) as stated on the series datasheet (a reference dimensional design rather than full standard certification). The series covers nominal sizes across 1/8"–2". Refer to the dimensional schedule on this product page to match each thread size against its corresponding envelope length, outside diameter or across-flats width, and unit weight. Before installing this BSPP female/female flat seat union with PTFE seal, verify that your mating ports match the BSPP Female × BSPP Female interface and select an appropriate thread sealant or gasket for the joint. Specify the required nominal size from 1/8"–2" and confirm installation clearance when ordering.
Technical specifications
Specifications
- Manufacturing & Standards Reference
- Investment cast, generally manufactured to ISO 4144 or above.
Dimensions · CH-F031
Applies only to the listed references; other material or end forms are outside this scope.
Units: SIZE: nominal pipe size; KG EACH: kg per piece. Length units appear beside applicable values.
| Nominal size | Chelsey reference | A | B | Unit weight (kg) |
|---|---|---|---|---|
| 1/8 | CH-F031-001 | 29.1 | 32 | 0.08 |
| 1/4 | CH-F031-002 | 29.1 | 33 | 0.10 |
| 3/8 | CH-F031-003 | 34 | 35.5 | 0.13 |
| 1/2 | CH-F031-004 | 37.5 | 37.8 | 0.15 |
| 3/4 | CH-F031-005 | 44.5 | 41 | 0.20 |
| 1 | CH-F031-006 | 53.5 | 49 | 0.37 |
| 1-1/4 | CH-F031-007 | 64 | 52 | 0.48 |
| 1-1/2 | CH-F031-008 | 71.5 | 56.3 | 0.66 |
| 2 | CH-F031-009 | 85.5 | 63 | 0.95 |
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