Cast Steel Spring Loaded Full Lift Single Post Safety Valve

NETA Cast Steel Spring Loaded, Full Lift, Single Post Safety Valve
S.S. 13% Cr. AISI-410 + ST.6 Seat and Body Ring and S.S. 13% Cr. (AISI-410) Stem
Inlet Flange End as per ASME B16.5 Class-300 Raised Face
Outlet Flange End as per ASME B16.5 Class-150 Raised Face

Max. BOP : 250 PSIG
Max. Working Temperature : 400°C
Test Pressure : 500 PSIG(Hyd.)

Full lift is achieved by rapid opening within an over pressure of 5% of the Set Pressure.
Each safety Valve is provided with an easing lever.
To avoid unauthorised alteration of set pressure each Valve is provided with adjusting screw and checknut, concealed under a cap with Pad Lock.

IBR Test Certificate in FORM III-C duly signed by the Director of Boilers, Punjab is provided.

Steam

84818010

PNo.	Part	Nos.	Material	Standard
1	Cap	1	C.I.	IBR 86 to 93 Gr.A
2	Locking Pin	1	Bronze	IBR 282(a)(iv) Gr.B
3	Stem	1	S.S. 13% Cr.	AISI – 410
4	Adjusting Screw	1	Bronze	IBR 282(a)(iv) Gr.B
5	Easing Lever	1	Cast Iron	IBR 86 to 93 Gr.A
6	Gasket	1	Spiral Wound S.S. 304 Graphoil Filler with Inner Ring	–
7	Disc Guide	1	Bronze	IBR 282(a)(iv) Gr.B
8	Locking Screw	1	M.S.	IS:1367
9	Blow Down Ring	1	Bronze	IBR 282(a)(iv) Gr.B
10	Body Seat Ring	1	S.S. 13% Cr./Monel	AISI – 410/ Ni.Cu.Alloy
11	Body	1	Cast Steel	ASTM A216 Gr. WCB
12	Pad Lock	1	M.S.	–
13	Check Nut	1	Bronze	IBR 282(a)(iv) Gr.B
14	Bush	1	Bronze	IBR 282(a)(iv) Gr.B
15	Upper Spring Disc	1	M.S./ S.S. 13% Cr.	IS:1367/ AISI-410
16	Spring	1	Carbon Steel	IBR-307 (a)
17	Spring Chamber	1	Cast Steel	ASTM A216 Gr.WCB
18	Lower Spring Disc	1	M.S. / S.S. 13% Cr.	IS:1367/AISI-410
19	Nuts & Studs	To Suit	M.S.	IS:1367
20	Disc	1	S.S. 13% Cr. / Monel	AISI – 410 / Ni.Cu.Alloy

Nominal Size (mm)	A±1	B	C(MIN.)	A’±1	C'(MIN.)	F±3	G±3	H	MRP / Piece
25	124	25	18	110	16	90	108	283	–
40	156	40	22	127	18	102	120	343	–
50	165	50	24	152	20	121	140	407	–
65	190.5	65	26	178	22	135	152	483	–
80	210	80	30	190.5	24	160	178	550	–
100	255	100	32	230	26	186	190	637	–

Nominal Size (mm)	A±1	B	C(MIN.)	A’±1	C'(MIN.)	F±3	G±3	H	MRP / Piece
25	124	25	18	110	16	90	108	283	–
40	156	40	22	127	18	102	120	343	–
50	165	50	24	152	20	121	140	407	–
65	190.5	65	26	178	22	135	152	483	–
80	210	80	30	190.5	24	160	178	550	–
100	255	100	32	230	26	186	190	637	–