Data Sheet

A81 Valve
D103301X012
Product Bulletin
21.1:A81
July 2012
3
A81 Valve Specifications and Materials of Construction
Table 1. Fisher A81 Valve Specifications
Specifications EN ASME
Valve Body Size DN 50, 80, 100, 150, 200, 250, and 300 NPS2,3,4,6,8,10,and12
Pressure Rating PN 10 to 40 per EN 12516-1 CL150 / 300 per ASME B16.34
Valve Body Materials
EN 1.0619 steel WCC steel
EN 1.4409 stainless steel CF3M (316L) stainless steel
LCC LCC
CW2M
(1)
CW2M
(1)
M35-2
(2)
M35-2
Disk Materials
PTFE or RPTFE
(4)
Seal
EN 1.4409 stainless steel CF3M stainless steel
CW2M CW2M
M35-2 M35-2
Metal or UHMWPE
(3)
Seal
Chrome-plated EN 1.4409 Stainless Steel Chrome-plated CF3M Stainless Steel
End Connections Mates with raised-face flanges per EN 1092-1 Mates with raised-face flanges per ASME B16.5
Valve Body Style Wafer (flangeless) and single flange with tapped or through holes
(5)
Face-to-Face Dimensions Meets MSS SP68, API 609, and EN 558 standards
Shutoff
PTFE, RPTFE, or UHMWPE seal ring - No visible leakage per MSS SP-61
S31600 (316 SST) seal ring - 0.1scfhperunitofNPS(NPS6valve=0.6scfh)perMSSSP-61
Flow Coefficients See Fisher Catalog 12
Flow Direction Standard (forward flow) is with the seal retainer facing upstream; reverse flow is permissible for soft seals only
Flow Characteristic Approximately linear
Disk Rotation Counterclockwise to open (when viewed from actuator side of valve body) through 90 degrees of disk rotation
Shaft Diameters and Approximate Weights See table 8
1. This material is not listed in EN 12516-1orASMEB16.34.Seefigure6forpressure/temperatureratings.
2. This material is not listed in EN 12516-1.Seefigure6forpressure/temperatureratings.
3. UHMWPE stands for ultra high molecular weight polyethylene.
4. RPTFE is a reinforced PTFE seal.
5.LCCconstructionisstandardinwaferstyleonly.ConsultyourEmersonProcess Management sales office for single flange valve body style information.
Table 2. Materials (Other Valve Components)
Component Material
Shafts and Pins S17400 (17-4PH) stainless steel, S20910 (XM-19) stainless steel, N10276, N05500
Anti-blowout Ring N07718
Seal PTFE, RPTFE, or UHMWPE with S31600 (316 stainless steel) or R30003 spring. Metal seal is 316 stainless steel with graphite gaskets
Bearings PEEK/PTFE, R30006 (Alloy 6), S31600 Nitride
Packing PTFE/carbon-filled PTFE (standard), graphite die-molded ribbon, ENVIRO-SEAL PTFE packing, ENVIRO-SEAL graphite packing
Follower Spring N07718 with carbon-filled PEEK or S 3160 0 s pring seats
Bolting B8M Class 2, B7M, N0550 0, N0771 8
Nuts 8M, 2HM, N 04400, N10276
Table 3. Trim Combinations with Standard Construction Materials
Valve Body Material Shaft Material Disk Material Bearings Seal Material
1.0619 & WCC S17400 H1075
1.4409 & CF3M PEEK/PTFE PTFE or RPTFE
1.4409 & CF3M Chrome-Plated
PEEK/PTFE UHMWPE or Metal
Alloy 6 or S31600 Nitride Metal
LCC S17400 H1075 1.4409 & CF3M PEEK/PTFE PTFE
1.4409 & CF3M S20910
1.4409 & CF3M PEEK/PTFE PTFE or RPTFE
1.4409 & CF3M Chrome-Plated
PEEK/PTFE UHMWPE or Metal
Alloy 6 or S31600 Nitride Metal
CW2M N10276 CW2M PEEK/PTFE PTFE or RPTFE
M35-2 N05500 M35-2 PEEK/PTFE PTFE or RPTFE