Cla-Val 81-01/681-01 Technical Manual - Manual (Page 9)

Dimensions
(In inches)
Model 681-01 (Uses Basic Valve Model 100-20)
100-20
(Globe)
Model 681-01 Dimensions (In Inches)
100-20
(Angle)
Component Standard Material Combinations
Body & Cover Ductile Iron Cast Steel Bronze
Available Sizes 3" 3" 3"
Disc Retainer &
Diaphragm Washer
Cast Iron Cast Steel Bronze
Trim: Disc Guide,
Seat & Cover Bearing Bronze is Standard
Stainless Steel is Optional
Disc Buna-N ® Rubber
Diaphragm Nylon Reinforced Buna-N ® Rubber
Stem, Nut & Spring Stainless Steel
For material options not listed, consult factory.
Cla-Val manufactures valves in more than 50 different alloys.
Materials
Valve Size (Inches) 3
A 150 ANSI 10.25
AA 300 ANSI 11.00
B Dia. 6.62
C Max. 7.00
D 150 ANSI —
DD 300 ANSI —
E 150 ANSI —
EE 300 ANSI —
F 150 ANSI 3.75
FF 300 ANSI 4.12
H NPT Body Tapping 3 ⁄
8
J NPT Cover Center Plug 1 ⁄
2
K NPT Cover Tapping 3 ⁄
8
Valve Stem Internal
Thread UNF
10-32
Stem Travel 0.6
Approx. Ship Wt. Lbs. 45
X Pilot System 13.00
Y Pilot System 10.00
Z Pilot System 10.00
Pressure Ratings (Recommended Maximum Pressure - psi)
Valve Body & Cover
Pressure Class
Flanged
Grade Material
ANSI
Standards*
150
Class
300†
Class
ASTM A536 Ductile Iron B16.42 250 640
ASTM A216-WCB Cast Steel B16.5 285 720
ASTM B62 Bronze B16.24 225 500
Note: * ANSI standards are for flange dimensions only.
Flanged valves are available faced but not drilled.
† Consult factory when Maximum Operating Pressure Differential
(MOPD) is greater than 400 PSID