Nuclear power engineering

- A10 / A11

Bellows sealed globe and control valve A10, A11

DN 10 – 150

Technical description

A10, A11 DN 10 – 40
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.

A10, A11 DN 50 – 150
Body made of closed-die or open-die forging with offset ends, forged yoke, joined by a bonnet joint; for Pp up to 4 MPa with a sealing ring, for others without an inserted seal. Valves for Pp above 4 MPa can alternatively also be supplied with a sealing ring. 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. Packing and bonnet joint sealing rings are made of asbestos-free material. The stem nut in the yoke head is mounted in disc springs that compensate for thermal expansion.

Image gallery

Drawings and dimensions

Application

Globe valve (A10) or valve for coarse control (A11) with linear characteristic, 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.

Operation

Operated by handwheel, by an electric actuator located inside or outside the containment, by bevel gear and by direct remote control. Valves with a handwheel can be equipped with a locking device.

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. The body-to-bonnet weld is inspected by radiography and ultrasound.

Installation

The valves can be installed in any position with the flow under the plug; globe (shut-off) valves also with the flow over the plug. The exception is operation by an electric actuator, where the motor axis must be horizontal. For remote operation, the maximum deflection angle of the extension rods is 250°. Electric actuators and gears are connected to the valve according to ISO 5210 and DIN 3210. Valves with this type of operation are anchored, especially for seismic loads. Control valves with electric actuators are installed together with a contactor box with brake.

Connection

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

Documentation

Operating parameters

Bellows sealed globe and control valve A10, A11, DN 10 – 150, Pp 4 ÷ 20 MPa
Pp (MPa)	Temperature (°C)
	250	275	300	250	300	335	350
	Body material
	12 020			08Cr18Ni10Ti
	Acceptable 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
100	Handwheel	ČSN 133110
054	Sealing ring	Exp. graphite
049	Nut	ČSN 021401
081	Screw	17134.7-14X17H2
076	Guide	11
033	Stem nut	12040.6-423046
013	Seal cover	27,28
095	Sealing ring	Exp. graphite
016	Plug disc	08X18H10T
079	Bellows	W Nr. 1.4541
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
074	Bellows	W Nr. 1.4541, 08X18H10T
	Body surfacing, plug disc	C1111
002	Body	08X18H10T

Dimensions

• DN 10 – 40, Pp ÷ 20 MPa (12x)
A10, A11 12x
DN	Pp (MPa)	A	B + C		D (max)	H	L	V 4	V 1		Handwheel (kg)	El. actuator (kg)
			Outside containment	Inside containment					Outside containment	Inside containment		Outside containment	Inside containment
10 15	4	160	490	550	25	31	160	267	530	510	3,7	47,5	56,5
	14							307	570	550	5,3	49	58
	20							227	585	565	6	49,5	59
20 25	4		490	550	35	45		302	560	540	5,9	49,5	59
	14	250						377	625	605	8,5	52	61
	20							397	645	625	10	53,5	63
32 40	4		490	550	48	52	260	370	615	595	9,1	51	70
	14	320						480	735	715	19	58	77
	20							495	750	730	20	59	78

• DN 10 – 40, Pp ÷ 20 MPa (82x)
A10, A11 82x
DN	Pp (MPa)	A	B + C		D (max)	H	S	L	V	V 1		Handwheel (kg)	El. actuator (kg)
			Outside containment	Inside containment						Outside containment	Inside containment		Outside containment	Inside containment
10 15	4	160	490	550	25	40	24	130	255	506	486	3,7	47,5	56,5
	14								296	546	526	5,3	49	58
	20								315	561	541	6	49,5	59
20 25	4		490	550	37	58	35	160	285	525	505	5,9	49,5	59
	14	250							360	590	570	8,5	52	61
	20								380	610	590	10	53,5	63
32 40	4		490	550	45	71	45	280	350	570	550	9,1	51	70
	14	320							460	690	670	19	58	77
	20								475	705	685	20	59	78

• DN 50 – 150, Pp ÷ 20 MPa
DN	Pp (MPa)	B + C		A	D (max)	H	L	S	V	V 1		Handwheel (kg)	El. actuator (kg)
		Outside containment	Inside containment							Outside containment	Inside containment		Outside containment	Inside containment
50	4	490	550	250	60	115	230	70 60*	390	708	653	32	68	78
	14	648	685	400		119			600	895	875	62	128	140
	20	648	685	500					700	995	975	66	135	166
65	4	490	550	320	81	165	340	110 77*	535	810	755	61	99	117
	14	648	685	400					700	1170	1150	103	171	199
	20	809	933	500					880	1380	1375	147	280	302
80	4	648	685	450	95	211	380	140 115*	640	880	860	116	179	210
	14	809	933	710		220			850	1355	1350	195	337	407
	20	809	933	800					960	1408	1403	208	350	420
100	4	648	685	450	113	231	430	160 115*	640	900	880	121	183	214
	14	809	933	710		240			850	1355	1350	208	350	420
	20	809	933	800					960	1408	1403	221	433	421
125	4	809	933	710	141	312	550	210 170*	730	1246	1241	235	365	387
	14	955	-			320			1400	1810	-	384	620	-
	20	955	-	800		325			1485	2050	-	583	929	-
150	4	809	933	710	168	312	550		730	1246	1241	240	370	392
	14	955	-			320			1400	1810	-	392	628	-
	20	955	-	800		325			1485	2050	-	593	940	-

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