Ball Valve

The floating ball valve design is based on the concept that both seat preload and the line pressure contribute to a compressive force between the ball and seat to create a bubble tight shut-off at low and high pressure drop. The line pressure forces the ball to the downstream seat, the seat flexes and create the seal. The upstream seat is forced forward, allowing the pressure to penetrate from behind through the groove and into the body cavity, relieving the load and reducing its wear.

Material of construction for valves (Shell):

Cast Steel

ASTM A 216 Gr WCB, WCC, ASTM A 352 Gr LCB, LCC, LC1, LC2, LC3

Alloy Steel

ASTM A 217 Gr WC1, WC6, WC9, C5, C12, C12A, CA15

Stainless Steel

ASTM A 351 Gr CF8, CF8M, CF3, CF3M, CF8C, CG8M, CG3M, CN7M etc

Duplex stainless steel

ASTM A 351 Gr CD4MCu, CK3MCuN (any other material on customer's request)

Cast Iron

C.I. IS 210 Gr. FG200

Also available in forged steel for below 2 inch size valve.

Drawing:

Drawing Specification:

P.NO.	Nomenclature
1	Body
2	End Piece
3	Body Seal
4	Body stud & Nuts
5	Seat
6	Ball
7	Stem
8	Stem washer
9	Stem seal
10	Spring
11	Washer
12	Gland Nut
13	Lever

Description:

Screwed end (3PC)/ Welded end (3PC)/ Flanged end (2PC)/ Flanged end (3PC).

Size Range:

ANSI Class 150: upto 4"
ANSI Class 300: upto 4"
ANSI Class 600: upto 2"
ANSI Class 800: upto 2"

Design Standards:

BS 5351/ API 6D

Salient Features:

Mirror-finished solid ball
Fine-grained PTFE seats
Fire-safe
Cavity Pressure Relief mechanism
Leak-tight stem sealing
Antistatic feature
3-Piece construction allows for in-line maintenance and cleaning.
Teflon seats and seals are glass reinforced for added strength and superior chemical compatibility.
Internally loaded, blowout proof stem provides safety in the event of over pressure.