Single Piece Design Full Port, Screwd End & Socket Weld End Disc !

Product Details
Manufacturing Standard : BS 5351
Testing Standard : BS 5146
Product Range : 15 to 50 mm
End Connection :
Screwed End BSPT / NPT / BSP
Female Ends Et Socket Weld End

Minimum Pressure / Temperature Seat Ratings

Nominal size
of valve (DN)
Service Temperature (°C)
-30 to 40 50 75 90 100 125 150 175 200 230
Full bore Minimum non-shock pressure
bar bar bar bar bar bar bar bar bar bar
8 to 20 69 66 56 51 47 38 29 20 11 0
25 to 65 50 49 48 48 47 38 29 20 11 0
80 to 100 42 42 42 42 39 32 24 17 9 0
150 31 31 31 31 29 23 18 12 7 0
200 to 400 21 21 21 21 20 16 12 8 5 0

Dimensions of 3 pc/scr end in mm

Size L F/B Ends D
15 70 12.5 1/2"
20 74 19 3/4"
25 88 25 1"
40 102 38 1/2"
50 117 51 2"

Material Specifications

No. Part Name Materials
1 Body ASTMA : ASTMA : ASTMA
2 Body Connector 351 CF8 :351 CF8M : 215 WCB
3 Connector Seal PTFE
4 Ball AISI 304, 316, ASTMA CF8-CF8M
5 Steam AISI 304, AISI 316
6 Ball Steam PTFE
7 Steam Seat PTFE
8 Gland Packing PTFE
9 Gland AISI 304, AISI 316
10 Gland Nut SS 304
11 Lever SS / Ms
12 Lever Nut SS 304
13 Lever Sleeve PVC
14 Body Studs & Nuts SS 304 / M.S.

Test Pressure
(Hydrostatic)

Class 150 lbs 300 lbs
Body 450 PSIG or 31.5 Kg/cm2g 1100 PSIG or 77 Kg/cm2g
Seat 315 PSIG or 22 Kg/cm2g 800 PSIG or 56 Kg/cm2g

Test Pressure
(Pneumatic)

Class 150 lbs
Seat 80 PSIG or 5.5 Kg/cm2g

Dimensions of Socket Weld end
(in mm)

Size 15 20 25 40 50
Socket Size 21.8 27.1 33.8 48.7 61.1

* The illustrations, specifications a data in this leaflet are as accurate as possible, improvements and modifications from time to time to time may necessitate change in designs and dimensions without prior notice.