11
SaundersA TypeDiaphragmValves
DiaphragmMaterials of Construction
Full traceability of
manufacture to
EN10204 3.1b (was
DIN 50049 3.1b)
Coding tag for both
material and batch
number for easy
identification
Saunders name to
confirm genuine
manufacture and
maximum reliability
Standard
Rubber diaphragms
have a brass stud
Diaphragms suitable
for vacuum duties
(eg. CV) have steel
stud
PTFE diaphragms are
fittedwith stainless
steel bayonet
Saunders
Diaphragms are
providedwith:–
Grade
Elastomer type
General service and approvals
C
Butadiene Acrylonitrile, sulphur cured,
Lubricating oil, cutting oils, paraffin, animal
black reinforced
and vegetable oils, aviation kerosene
CV
Butadiene Acrylonitrile, sulphur cured,
Vacuumwhere oils are present,
black reinforced
compressed air, liquid petroleum gas (LPG)
HT
Polychloroprene, sulphur cured,
Abrasive slurries containing hydrocarbons
black reinforced
Q
Natural rubber polyisoprene/SBR,
Salts inwater, dilute acids and alkalis, abrasives
sulphur cured, black reinforced
226
Fluoroelastomer, amine cured,
Concentrated acids, aromatic solvents, chlorine, ozone,
black reinforced
chlorinated solvents, unleaded petroleum
237
Chlorosulphonated polyethylene
Strong acids, sodium hypochlorite, chlorine gas
metal oxide cured, black reinforced
286
Chlorosulphonated polyethylenemetal
Firemains isolation inWFB valve
oxide cured, black reinforced Kevlar
fabric reinforced
300
Isobutylene Isoprene, resin cured
Salts inwater, dilute acids and alkalis, drinkingwater,
black reinforced
Food &Drug Administration (FDA), United States
Pharmacopeia (USP), Water Regulations Advisory
Scheme (WRAS)
425
Ethylene propylene (EPM)
Salts inwater, acids and alkalis, ozone, intermittent
organic peroxide cured, black reinforced steam,drinkingwater,FDA, USP, WRAS
425V
Ethylene propylene (EPM)
Vacuumwhere acid, alkali, water vapours are present,
organic peroxide cured, black reinforced FDA, USP, WRAS
214/226
Virgin PTFE/Fluoroelastomer – two piece Strong acids, solvents, chlorine, bromine
at higher temperatures
214/300
Virgin PTFE/Isobutylene isoprene –
Strong acids, alkalis and salts inwater at high
two piece
temperature. Constant steam, water for injection (WFI),
biopharmaceuticals, FDAUSP, WRAS
214/425
Virgin PTFE/Ethylene propylene –
Strong acids, alkalis and salts inwater at high
two piece
temperature. Constant steam, water for injection (WFI),
biopharmaceuticals, FDA, USP, WRAS
214S/425
Virgin PTFE/PPVE/Ethylene propylene – Strong acids, alkalis and salts inwater at high
two piece
temperature. Constant and intermittent steam,
WFI, biopharmaceuticals, FDA, USP, WRAS
214K/425
Virgin PTFE/PVDF/Ethylene propylene – Chlorine, bromine gas and chlorinated solvents
three piece
