Nuclear power engineering

- A13

Bellows sealed quick-acting globe valve A13

DN 10 – 150

Technical description

Body made of closed-die forging with offset or straight-through ends, cast yoke, joined by a bayonet joint. Seat in the body and sealing surface of the plug hard-faced with a cobalt-free hard-facing alloy. Stem sealed with a multi-ply bellows with back-up packing. Body sealed with a sealing ring which, like the back-up packing, is made of asbestos-free material.

Image gallery

Drawings and dimensions

Application

Quick-acting globe valve intended for radioactive water, steam, gases and all other media, particularly in primary, secondary and auxiliary circuits of nuclear power plants and chemical plants, for installation inside or outside the containment (HZ), seismically resistant, for the operating parameters given in the table.

Operation

Operated by an electric actuator located inside the containment, ensuring quick closing or opening of the valve.

Testing

The valves are tested with demineralised water for strength and tightness at a minimum of 1.6 times Pp, with air for operability and seat tightness at Pp and for vacuum tightness with helium at a vacuum of 5·10⁻¹ Pa. No indication greater than 1·10⁻⁵ Pa·l·s⁻¹ is permitted.

Installation

The valves can be installed in any position with the flow under or over the plug. The motor axis must be horizontal. Electric actuators are connected to the valve according to ISO 5210 and DIN 3210. The valves are anchored, especially for seismic loads.

Connection

Butt-welded according to ČSN and GOST standards. The valves can be supplied with electric actuators from ZPA Pečky.

Documentation

Operating parameters

Bellows sealed quick-acting globe valve A13, DN 10 – 150, Pp 4 ÷ 20 MPa
Pp (MPa)	Temperature (°C)
	250	275	300	250	300	335	350
	Body material
	12 020			08Cr18Ni10Ti
	Operating pressure MPa
÷ 4	2,5	-	-	2,5	-	-	-
	4	-	-	4	-	-	-
	-	-	8,6	-	9,2	-	-
4 ÷ 14	12	6	9,2	-	11	14	-
	-	-	11	-	-	-	-
14 ÷ 20	-	-	-	-	20	-	18

Materials of main parts

• DN 10 – 40
Pos.	Part identification	Material
054	Sealing ring	Exp. graphite
049	Nut	ČSN 021401
081	Screw	17134.7-14X17H2
033	Stem nut	12040.6-423046
095	Sealing ring	Exp. graphite
016	Plug disc	08X18H10T
078	Stem with bellows	17134.7 – 14X17H2
012	Yoke	27,28
	Body surfacing – plug disc	C1111
002	Body	12020	08X18H10T

• DN 50 – 150
Pos.	Part identification	Material
054	Sealing ring	Exp. graphite
033	Stem nut	42 3046
046	Nut	17 134, 14X17H2
044	Bolt	XH35BT
095/1	Sealing ring	Exp. graphite
015	Stem	17 134 – 14X17H2
016	Plug disc	08X18H10T
078	Bellows complete unit	–
	Body surfacing, plug disc	C1111
002	Body	08X18H10T

Dimensions

• DN 10 – 40 (123)
A13 123
DN	Pp (MPa)	B + C		D (max)	H	L	VI		Closing time [s]		kg
		Inside containment	Outside containment				Inside containment	Outside containment	Inside containment	Outside containment	Inside containment	Outside containment
10 15	4	550	490	25	31	160	518	573	4,2	4,2	56	48
	14						558	603	3,6	3,6	57	49
	20						573	628			58	50
20 25	4			35	45	160	572	627	8,4	5,3	58	50
	14						637	692	4,7	4,7	61	53
	20						657	712			62	54
32 40	4			48	52	260	620	675	6,0	6,0	70	52
	14						740	795	5,3	5,3	77	59
	20						755	810			78	60

• DN 50 – 150 (823)
A13 823
DN	Pp (MPa)	B + C		D (max)	H	L	S	VI		Closing time [s]		kg
		Inside containment	Outside containment					Inside containment	Outside containment	Inside containment	Outside containment	Inside containment	Outside containment
10 15	4	550	490	25	40	130	24	506	561	4,2	4,2	56	48
	14							546	601	3,6	3,6	57	49
	20							561	616			58	50
20 25	4			37	58	160	35	555	610	8,4	5,3	57	50
	14							620	675	4,7	4,7	61	53
	20							640	695			62	54
32 40	4			45	71	180	45	600	655	6,0	6,0	59	52
	14							720	775	5,3	5,3	66	59
	20							735	790			67	60

• DN 50 – 150
DN	Pp (MPa)	B + C		D (max)	H	L	S	VI		Closing time [s]		kg
		Inside containment	Outside containment					Inside containment	Outside containment	Inside containment	Outside containment	Inside containment	Outside containment
50	4	550	535	60,2	115	230	70	708	741	2,9	2,9	88	62
	14	685	648		120			895	915			159	131
	20							995	1015			166	138
65	4	550	536	80	165	340	110	810	855	6,3	4,0	117	95
	14	685	648		165			1170	1190	4,0		213	173
	20	913	809					1380	1385			362	292
80	4	685	648	94	211	380	140	880	900	5,1	5,1	210	182
	14	913	809		220			1695	1700	5,7	5,7	407	339
	20							1406	1411			420	352
100	4	685	648	112,9	231	430	160	900	920	5,1	5,1	214	186
	14	913	809		240			1695	1700	5,7	5,7	420	352
	20							1406	1411			433	365
125- 150	4	913	809	167	312	550	210	1246	1251	6,4	6,4	452	384

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