The MEI Series CH is a wafer-type butterfly valve made from AISI 316L, designed for installation between flanges in lines requiring stainless steel construction and a clean internal surface. The technical datasheet specifies a typical range of DN100–DN500 and compatibility with UNI PN10 flanges. The product page mentions PN10/PN16 options and DIN/ANSI standards, so flange drilling must be confirmed during procurement.
Seat selection is not solely based on temperature. Fluid, CIP cleaners, pH, concentration, contact time, and surface requirements must be checked. EPDM is typically used in water and neutral fluids, silicone in applications requiring elasticity and clean contact, while PTFE shell is considered for better chemical resistance at the contact surface.
Not automatically suitable for steam, corrosive chemicals, or abrasive slurry. For these services, confirmation of temperature, pressure, seat, handling torque, and AISI 316L compatibility is required.
Is it a control valve?
Primarily used for isolation. Limited throttling is possible, but not as a continuous operation control valve.
What should be specified in the order?
DN, PN/flange standard, seat material, handling type, fluid, operating temperature, and material certification requirement.
Wafer design
Easy installation
Available materials : AISI 316L
Standard finish : interior polished to a mirror finish, exterior satin finish
TRANSPARENT SILICONE / EPDM / PTFE Seat
Standard Series DN 100 – DN 500
Inserted between flanges
Compatible for UNI PN 10 flanges
Machine tool finishes
| DN | A | L | D PN10 |
| 100 | 36 | 131 | 164 |
| 150 | 40 | 177 | 220 |
| 200 | 40 | 202 | 275 |
| 250 | 44 | 227 | 330 |
| 300 | 46 | 254 | 380 |
| 350 | 46 | 291 | 440 |
| 400 | 50 | 316 | 490 |
| 500 | 64 | 370 | 595 |
Accessories & Compatibility
