High Temperature Flanged Swing Check Valve BS1868 API6D Standard For Offshore Oil

API 6D BS1868 SWING CHECK VALVE PSB 900LB WCC BODY FOR HIGH TEMPERATURE RTJ FLANGE

BODY

Its spherical form of large radius allows for the stresses. turbulence and resistance to flow to be kept to a minimum.
BODY-BONNET JOINTS
Body-Bonnet Joints of check valves are machined as follows :
On 150 and300 classes ; male and Female.
On 600, 900 and 1500 classes : RTJ

SEAT RINGS

Seat ring are manufactured in two different ways, depending on the class and type of valves:
1) Screwed seat rings, bottom seated type lapped on both side.
They are dry assembled, with a controlled torque setting to t body.
2) Welded-in seat rings, designed in order to prevent any turbulence and avoid damages due to corrosion

Both are forged or rolled in one piece, for all dimensions. They are heat treated to obtain the requested surface hardness, and are perfectly cleaned before assembling.

INSERT SEAT RINGS

These rings are manufactured with teflon or viton inserts, depending on fluid and service conditions.
They provide an elastometer primary seal. combined with a fire sale metal to-metal secondary seal, for temperatures from - 100oC (-144oF) to 204.4oC (400F) [fig. A]
Where maintenance is a potential problem the viton insert is in the form of a toroidal ring so that it can easily be removed
END CONNECTIONS

Our standard production covers valves with :

Flanged ends (RF) that conform to ANSI B 16.5 and face to face dimensions that conform to ANSI B 16.10, with a raised face serrated finish or, on request, with any other of finish.
Butt-welding ends (BW) with end to end dimensions that conform to ANSI B 16.10.
Customer must specify the type of schedule required, or class of pipe, or diameter and bore.
Ring-joint flanged ends (RTJ) that conform to ANSI B16.5, with end to end dimensions ANSI B 16.10
Other Special end connections are supplied to customers’ special requirements.

SPECIAL CONSTRUCTIONS

A) Outside lever and weight
On request swing check valves can be furnished with an outside lever and weight. The object of the lever and On weight is either to balance the disc or give it added weight. In balancing the disc the valve will open with a minimum of pressure.
When the disc is weighted the valve will be very sensitive to a reversal of flow.
B) Dashpot feature
In case of intermittent use or in presence of thrusts, dashpot feature is highly recommended.
In such instance the dashpot feature gradually causes the opening and closing of disc preventing therefore dangerous shocks.
c) Check valves with pneumatic safety control
This is in the form of a simple pneumatic piston. In normal conditions of use, it pushes up the lever, thereby moving a special cam, that allows the disc to move.
Should there be no air in the cylinder, the spring allows the lever, and hence the disc to descend, thereby assuring that incloses before any inversion of flow.

No.	Component Name	Qty.
1	Body	1
2	Cover	1
3	Gasket	1
4	Seat Ring	1
5	Disc	1
6	Hinge	1
7	Disc Washer	1
8	Disc Nut	1
9	Hinge Pin	1
10	Guide Bush	2
11	Body Nut	12
12	Body Bolt	6
13	Lifting Eye Bolt	1

Check Valves - ASME Class 900 & 15

Dimensions (in mm, unless specified) & Weights (in kg)

Valve Size	Class 900					Class 1500
	L		H	Approx. Wt.		L		H	Approx. Wt.
	FI.	B/W		FI.	B/W	FI.	B/W		FI.	B/W
50 (2”)	–	–	–	–	–	368	368	250	69	53
65 (21/2”)	–	–	–	–	–	–	–	–	–	–
80 (3”)	381	381	250	88	70	470	470	285	118	89
100 (4”)	457	457	280	162	131	546	546	340	177	134
150 (6”)	610	610	350	336	275	705	705	400	566	467
200 (8”)	737	737	420	673	569	832	832	465	892	728
250 (10”)	838	838	510	938	789	991	991	570	1730	1447
300 (12”)	965	965	610	1480	1280	1130	1130	680	2580	2157

Fl. – Flanged ; B/W – Butt-weld.