The Model 75L's specification:

Sizes-Inches/DN 
3/4 to 8 inch(DN20 to DN200) 

Maximum working pressure: 
350 psi (25 bar) Sch. 40S, cut groove only

The 75L is supplied standard in CF8 (304) and CF8M (316) with 304 or 316 bolts and nuts.

MODEL 75L'S  MATERIAL SPECIFICATIONS : 
Housings: 
Type 304 Stainless steel to ASTM A351 CF8 or A743 Gr. CF8 
Type 316 to ASTM A743 CF8M 
Type 316L to ASTM A743 CF3M 

Rubber Gaskets: 
The gasket seals is C-shaped, made of standard gasket EPDM(ethylene propylene diene monomer) for cold water, hot water, rare acid, oil-free air and multiple chemical product (-50~150 degree). It is not suitable for medium like petroleum. 

Bolts & Nuts: 
Round-head, elliptoid-neck, carriage bolts, type 304 stainless steel bolts and heavy duty nuts conform to ASTM F-593 
Type 304 stainless steel bolts and heavy duty nuts conform to ASTM F-593 
Type 316 stainless steel bolts and heavy duty nuts conform to ASTM F-593

The application:

The Model 75L is designed for low pressure MF/UF/RO systems.