Data Sheet
Bulletin 71.4:MR98
11
Table 4. MR98 Series Trim Materials
TRIM
NUMBER
SEAT
ORIFICE/
VALVE PLUG
VALVE PLUG
GUIDE
STEM/STEM GUIDE BOTTOM PLUG WASHER
1 416 Stainless Steel 416 Stainless Steel 416 Stainless Steel 416 Stainless Steel 416 Stainless Steel 302 Stainless Steel
2 316 Stainless Steel 316 Stainless Steel 316 Stainless Steel 316 Stainless Steel 316 Stainless Steel 316 Stainless Steel
3 Alloy 6
(1)
Alloy 6
(1)
316 Stainless Steel 316 Stainless Steel 316 Stainless Steel 316 Stainless Steel
4 Hastelloy
®
C Hastelloy
®
C Hastelloy
®
C Hastelloy
®
C Hastelloy
®
C Hastelloy
®
C
5 Monel
®
Monel
®
Monel
®
Monel
®
Monel
®
Monel
®
6 Nitrile (NBR) 416 Stainless Steel 416 Stainless Steel 416 Stainless Steel 416 Stainless Steel 302 Stainless Steel
7 Nitrile (NBR) 316 Stainless Steel 316 Stainless Steel 316 Stainless Steel 316 Stainless Steel 316 Stainless Steel
8 Fluorocarbon (FKM) 416 Stainless Steel 416 Stainless Steel 416 Stainless Steel 416 Stainless Steel 302 Stainless Steel
9 Fluorocarbon (FKM) 316 Stainless Steel 316 Stainless Steel 316 Stainless Steel 316 Stainless Steel 316 Stainless Steel
10 Ethylenepropylene (EPDM) 416 Stainless Steel 416 Stainless Steel 416 Stainless Steel 416 Stainless Steel 302 Stainless Steel
11 Ethylenepropylene (EPDM) 316 Stainless Steel 316 Stainless Steel 316 Stainless Steel 316 Stainless Steel 316 Stainless Steel
1. Alloy 6 is not available for 1/4 in. size.
Table 5. MR98 Series Construction Materials
Monel
®
is a mark owned by Special Metals Corporation.
Hastelloy
®
C is a mark owned by Haynes International, Inc.
MAIN VALVE MATERIAL
Body Spring Case Control Spring
Gray cast iron,
WCC/LCC steel,
CF8M/CF3M stainless steel,
Monel
®
,
Hastelloy
®
C or
Aluminum-Bronze
Gray cast iron,
WCC/LCC steel,
CF8M stainless steel,
Monel
®
or
Hastelloy
®
C
Zinc-plated steel,
Stainless steel,
Powder-coated steel or
Powder-coated stainless steel
TRIM MATERIAL
Part Name Standard Optional
Elastomer Seat
Seat Nitrile (NBR) Fluorocarbon (FKM), EPDM or Peruoroelastomer (FFKM)
Diaphragm Neoprene (CR)
302 Stainless steel
(1)
, Fluorocarbon (FKM)
(2)
,
Ethylenepropylene (EPDM)
(2)
, Monel
®(1)
, Hastelloy
®
C
(1)
or with PTFE protector
(3)
Orice 416 Stainless steel 316 Stainless steel, Monel
®
or Hastelloy
®
C
Valve Plug 416 Stainless steel 316 Stainless steel, Monel
®
or Hastelloy
®
C
Valve Plug Guide 416 Stainless steel 316 Stainless steel, Monel
®
or Hastelloy
®
C
Pusher Post 416 Stainless steel 316 Stainless steel, Monel
®
or Hastelloy
®
C
Washer 302 Stainless steel 316 Stainless steel, Monel
®
or Hastelloy
®
C
Metal Seat
Seat 416 Stainless steel 316 Stainless steel, Monel
®
, Hastelloy
®
C or Alloy 6
Diaphragm 302 Stainless steel
(1)
Monel
®(1)
, Hastelloy
®
C
(1)
, Fluorocarbon (FKM)
(2)
,
Ethylenepropylene (EPDM)
(2)
, Neoperene (CR) or
with PTFE protector
(3)
Orice 416 Stainless steel 316 Stainless steel, Monel
®
, Hastelloy
®
C or Alloy 6
Valve Plug 416 Stainless steel 316 Stainless steel, Monel
®
, Hastelloy
®
C or Alloy 6
Valve Plug Guide 416 Stainless steel 316 Stainless steel, Monel
®
or Hastelloy
®
C
Pusher Post 416 Stainless steel 316 Stainless steel, Monel
®
or Hastelloy
®
C
Washer 302 Stainless steel 316 Stainless steel, Monel
®
or Hastelloy
®
C
1. Two diaphragms are required if metal diaphragm is to be used except for Types MR98L and MR98LD, 2 to 7 psi / 0.1 to 0.5 bar which use only one.
2. Two diaphragms are required if Fluorocarbon (FKM) or Ethylenepropylene (EPDM) diaphragm is to be used.
3. PTFE protector is only available for Fluorocarbon (FKM), Neoprene (CR) or 302 Stainless steel diaphragm.