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TRUNNION MOUNTED TYPE BALL VALVES
Oct 23, 2018

TRUNNION MOUNTED TYPE BALL VALVES- 3 Pcs Body

FORGED STEEL

Technical Specifications for 4, 6 and 8- Size Ball Valves

 (All Standards mentioned herein are meant to be the latest editions)

 

Full Bore, Regular Pattern Ball Valves to be used for Natural Gas having Sp. gr. 0.6 (At air = 1), to be field repairable, solid ball, antistatic device, blow out proof system, detailed description and specifications of the valves to be as follows:

Sl. no.

Item

Specification

1

Valve design and Manufacturing

As per API 6D

2

Flange dimension and Drilling

As per ASME B 16.5

3

Face to Face dimension

As per ASME B 16.10

4

Material   of construction:



(a)      Body,   Bonnet & Cover

ASTM A105


(b)     Ball

ASTM A182 F316


(c)      Stem

ASTM A182 F316


(d)                                   Seat

RPTFE


(e)      Trunnion   support

ASTM A182 F316


(f)      Bolting  

A193-B7 and A194-2H for   Bolts and Nuts respectively.


(g)      Spring

SS304


(h)     Packing

Graphite


(i)       Gland

A 182 F316


(j)       O ring

Viton


(k)     Gasket

SPW SS304+ Graphite


(l)       Handle   Wheel and Gearbox

WCB


(m) Lifting   Lug

A 105


(n)     Support   Feet

A 105




5

Valve Construction

(a)    Pressure class 150 RF

(b)   Side entry type.

(c)      03   pieces split body.

(d)     Trunnion   mounted.

(e)      Double   Block & Bleed

(f)      All   valves shall have Bolted Body.

(g)      Vent   plug and Drain Plug

(h)     All   valves shall have Greasing option.

(i)       Built   in Relief valve

(j)       Gear   box with hand wheel.

(k)     Each   valve shall be equipped with secondary seals between the ball and the seals   & the seal should be resistant to aromatic hydrocarbon.

6

Operation

Gear operated with wheel   for DN 4" & above.










7

Valve Testing

As per API 6D/598. Fire safe design   certificate (API607/6Fa) issued by internationally recognized authority i.e.   ABS/Lloyds/BV/DNV.

8

Valve Marking

The identification marking on valves shall be   as per API 6D (latest edition) including the following:

(a) Manufacturer’s trade mark on both body   and nameplate.

(b) API Monogram on nameplate.

9

Drawing & Data sheet:            

 

Manufacturer must submit size wise drawing   and data sheet of materials as described.

 



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