BS4825-3 HyClamp Hygienic Gaskets
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 FDA, USP 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.
|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|
Gasket Type Nominal
Gasket OD Gasket ID Material
Colour Part No. I - no lip 1.00" 25.40 50.50 22.80 FFKM G74S White HCN-0505002280-G74SW-0102 I - no lip 1.50" 38.10 50.50 35.50 FFKM G74S White HCN-0505003550-G74SW-0102 I - no lip 2.00" 50.80 64.00 48.20 FFKM G74S White HCN-0640004820-G74SW-0102 I - no lip 2.50" 63.50 77.50 60.50 FFKM G74S White HCN-0775006050-G74SW-0102 I - no lip 3.00" 76.20 91.00 73.20 FFKM G74S White HCN-0910007320-G74SW-0102 I - no lip 4.00" 101.60 119.00 97.80 FFKM G74S White HCN-1190009780-G74SW-0102 II - lipped 1.00" 25.40 50.50 22.80 FFKM G74S White HCL-0505002280-G74SW-0102 II - lipped 1.50" 38.10 50.50 35.50 FFKM G74S White HCL-0505003550-G74SW-0102 II - lipped 2.00" 50.80 64.00 48.20 FFKM G74S White HCL-0640004820-G74SW-0102 II - lipped 2.50" 63.50 77.50 60.50 FFKM G74S White HCL-0775006050-G74SW-0102 II - lipped 3.00" 76.20 91.00 73.20 FFKM G74S White HCL-0910007320-G74SW-0102 II - lipped 4.00" 101.60 119.00 97.80 FFKM G74S White HCL-1190009780-G74SW-0102
X-ray & metal detectable elastomers
Gasket Types & Sizes
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