YS & YD Valve Bulletin

Page 6

Bulletin 51.1:YD Table 1. Travel, Port, and Gasket Loading Pressure Drop Information MAXIMUM RATED TRAVEL

VALVE SIZE, INCHES 1/2, 3/4, 1, 1-1/2 2, 2-1/2 3 4 6

SEAT RING PORT DIAMETER

mm

Inches

mm

Inches

19 29 38 51 51

3/4 1-1/8 1-1/2 2 2

33.3 58.7 87.3 111.1 177.8

1-5/16 2-5/16 3-7/16 4-3/8 7

PRESSURE DROP LIMIT DUE TO GASKET LOADING Design YS Design YD(1) bar

psig

bar

psig

41.4 31.7 37.9 38.6 52.4

600 460 550 560 760

103.4

1500

1. For standard Design YD only. For high temperature Design YD, consult your Fisher sales office.

Table 2. Trim Materials MATERIAL

PART Valve Plug

Trim 2(1)

Trim 1

Trim 2A

Design YD

CB7Cu-1 (17-4PH SST)

CF8M (316 SST)

CF8M/CoCr-A

Design YS

S41600 (416 SST)

S31600 (316 SST)

CF8M/CoCr-A

Upper Cage and Lower Cage

CB7Cu-1

CF8M, ENC

CF8M, ENC

Upper Cage Retaining Ring (High-Temperature Design YD Only)

S41600

CF8M

CF8M

Upper Seat Ring (Design YS Only) and Lower Seat Ring

S41600

S31600

S31600/CoCr-A

1. Standard trim for stainless steel valves.

10A8391–A

B2413 / IL

10A8391–A

DESIGN YD PLUG DOWN

Figure 5. Flow Directions

6

10A8392–A

DESIGN YD PLUG UP

10A8392–A

DESIGN YS PLUG DOWN

DESIGN YS PLUG UP


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