BS4825-3 Hygienic Gaskets - HyClamp

BS4825:1991 is the British Standard for stainless steel tubes and fitting for the food industry and other hygienic applications. 
Part 3 - specification for clamp type couplings relates to the elastomer gaskets which are used to seal these couplings.

PPE manufactures Hyclamp™ gaskets to BS4825-3 in various imperial sizes from 1" to 4" (nominal), including Type I (unlipped) and Type II (lipped) variations.  A full range of sizes is shown below.

BS4825-3 hygienic gaskets are molded in several elastomer material grades, including EPDM, silicone, FKM and FFKM.  This range of materials provides a solution for every application including x-ray/metal detectable elastomers.  PPE's HyClamp™ materials meet various international sanitary standards and approvals including FDAUSP Class VI, 3A 18-03 Sanitary Standards and EC1935/EC2023, in addition to being free from animal derived ingredients (ADI-free).  More information on each of the materials is provided below.

Elastomer Materials

Material Code Hardness Operating Temperature Colour Approvals / Certification
G74S (FFKM) 71 IRHD -15 to +260°C White FDA, USP, 3A, EC, ADI-free
V70SW (FKM) 70 IRHD -10 to +200°C White FDA, USP, 3A, EC, ADI-free
E70Q (EPDM) 70 IRHD -40 to +150°C Black FDA, USP, 3A, EC, ADI-free
S71U (Silicone) 70 IRHD -60 to +200°C Translucent FDA, USP, 3A, EC, ADI-free
XV7A (FKM) 70 IRHD -20 to +200°C Blue FDA, EC, ADI-free
XE7A (EPDM) 70 IRHD -40 to +150°C Blue FDA, EC, ADI-free
XS7H (Silicone) 75 IRHD -60 to +200°C Black FDA, USP, EC, ADI-free
  • EPDM
  • VMQ (Silicone)
  • FKM (Fluoroelastomer)
  • FFKM (Perfluoroelastomer)
    Gasket TypeNominal
    Size
    (inch)
    Nominal
    Size
    (mm)
    Gasket ODGasket IDMaterial
    Type
    Material
    Grade
    ColourPart No.
    I - no lip1.00"25.4050.5022.80FFKMG74SWhiteHCN-0505002280-G74SW-0102
    I - no lip1.50"38.1050.5035.50FFKMG74SWhiteHCN-0505003550-G74SW-0102
    I - no lip2.00"50.8064.0048.20FFKMG74SWhiteHCN-0640004820-G74SW-0102
    I - no lip2.50"63.5077.5060.50FFKMG74SWhiteHCN-0775006050-G74SW-0102
    I - no lip3.00"76.2091.0073.20FFKMG74SWhiteHCN-0910007320-G74SW-0102
    I - no lip4.00"101.60119.0097.80FFKMG74SWhiteHCN-1190009780-G74SW-0102 
    II - lipped1.00"25.4050.5022.80FFKM G74SWhiteHCL-0505002280-G74SW-0102
    II - lipped1.50"38.1050.5035.50FFKMG74SWhiteHCL-0505003550-G74SW-0102
    II - lipped2.00" 50.8064.00 48.20FFKM G74SWhiteHCL-0640004820-G74SW-0102 
    II - lipped2.50" 63.50 77.5060.50FFKMG74SWhite  HCL-0775006050-G74SW-0102
    II - lipped3.00"76.2091.0073.20FFKMG74SWhiteHCL-0910007320-G74SW-0102
    II - lipped4.00"101.60119.0097.80FFKMG74SWhiteHCL-1190009780-G74SW-0102
  • X-ray & metal detectable elastomers

Gasket Types & Sizes

Type I unlipped             Type II lipped

Please see tables below for a list of sizes and part numbers provided by PPE:

BS4825-3 Unlipped (Type I) Gaskets

Nominal Size (inch) Nominal Size (mm) Gasket OD (mm) Gasket ID (mm) Material Type Material Grade Colour Part no.
1.00 25.40 50.50 22.80 FFKM G74S White HCN-0505002280-G74SW-0102
1.50 38.10 50.50 35.50 FFKM G74S White HCN-0505003550-G74SW-0102
2.00 50.80 64.00 48.20 FFKM G74S White HCN-0640004820-G74SW-0102
2.50 63.50 77.50 60.50 FFKM G74S White HCN-0775006050-G74SW-0102
3.00 76.20 91.00 73.20 FFKM G74S White HCN-0910007320-G74SW-0102
4.00 101.60 119.00 97.80 FFKM G74S White HCN-1190009780-G74SW-0102
1.00 25.40 50.50 22.80 FKM V70SW White HCN-0505002280-V70SW-0002
1.50 38.10 50.50 35.50 FKM V70SW White HCN-0505003550-V70SW-0002
2.00 50.80 64.00 48.20 FKM V70SW White HCN-0640004820-V70SW-0002
2.50 63.50 77.50 60.50 FKM V70SW White HCN-0775006050-V70SW-0002
3.00 76.20 91.00 73.20 FKM V70SW White HCN-0910007320-V70SW-0002
4.00 101.60 119.00 97.80 FKM V70SW White HCN-1190009780-V70SW-0002
1.00 25.40 50.50 22.80 EPDM E70Q Black HCN-0505002280-E70QB-0002
1.50 38.10 50.50 35.50 EPDM E70Q Black HCN-0505003550-E70QB-0002
2.00 50.80 64.00 48.20 EPDM E70Q Black HCN-0640004820-E70QB-0002
2.50 63.50 77.50 60.50 EPDM E70Q Black HCN-0775006050-E70QB-0002
3.00 76.50 91.00 73.20 EPDM E70Q Black HCN-0910007320-E70QB-0002
4.00 101.60 119.00 97.80 EPDM E70Q Black HCN-1190009780-E70QB-0002
1.00 25.40 50.50 22.80 Silicone S71U Translucent HCN-0505002280-S71UT-0005
1.50 38.10 50.50 35.50 Silicone S71U Translucent HCN-0505003550-S71UT-0005
2.00 50.80 64.00 48.20 Silicone S71U Translucent HCN-0640004820-S71UT-0005
2.50 63.50 77.50 60.50 Silicone S71U Translucent HCN-0775006050-S71UT-0005
3.00 76.50 91.00 73.20 Silicone S71U Translucent HCN-0910007320-S71UT-0005
4.00 101.60 119.00 97.80 Silicone S71U Translucent HCN-1190009780-S71UT-0005
1.00 25.40 50.50 22.80 FKM XV7A Blue HCN-0505002280-XV7AA-0002
1.50 38.10 50.50 35.50 FKM XV7A Blue HCN-0505003550-XV7AA-0002
2.00 50.80 64.00 48.20 FKM XV7A Blue HCN-0640004820-XV7AA-0002
2.50 63.50 77.50 60.50 FKM XV7A Blue HCN-0775006050-XV7AA-0002
3.00 76.50 91.00 73.20 FKM XV7A Blue HCN-0910007320-XV7AA-0002
4.00 101.60 119.00 97.80 FKM XV7A Blue HCN-1190009780-XV7AA-0002
1.00 25.40 50.50 22.80 EPDM XE7A Blue HCN-0505002280-XE7AA-0002
1.50 38.10 50.50 35.50 EPDM XE7A Blue HCN-0505003550-XE7AA-0002
2.00 50.80 64.00 48.20 EPDM XE7A Blue HCN-0640004820-XE7AA-0002
2.50 63.50 77.50 60.50 EPDM XE7A Blue HCN-0775006050-XE7AA-0002
3.00 76.50 91.00 73.20 EPDM XE7A Blue HCN-0910007320-XE7AA-0002
4.00 101.60 119.00 97.80 EPDM XE7A Blue HCN-1190009780-XE7AA-0002
1.00 25.40 50.50 22.80 Silicone XS7H Black HCN-0505002280-XS7HY-0005
1.50 38.10 50.50 35.50 Silicone XS7H Black HCN-0505003550-XS7HY-0005
2.00 50.80 64.00 48.20 Silicone XS7H Black HCN-0640004820-XS7HY-0005
2.50 63.50 77.50 60.50 Silicone XS7H Black HCN-0775006050-XS7HY-0005
3.00 76.50 91.00 73.20 Silicone XS7H Black HCN-0910007320-XS7HY-0005
4.00 101.60 119.00 97.80 Silicone XS7H Black HCN-1190009780-XS7HY-0005
Nominal Size (inch) Nominal Size (mm) Gasket OD (mm) Gasket ID (mm) Material Type Material Grade Colour Part no.

BS4825-3 Lipped (Type II) Gaskets

Nominal Size (inch) Nominal Size (mm) Gasket OD (mm) Gasket ID (mm) Material Type Material Grade Colour Part No.
1.00 Insert all BS4825 parts starting with HCL 00 00 00 00 00
1.50
2.00
2.50
3.00
4.00
Nominal Size (inch) Nominal Size (mm) Gasket OD (mm) Gasket ID (mm) Material Type Material Grade Colour Part No.
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