High temperature and high pressure desuperheating and reducing device

Structure features: the device is composed of pressure reducing system, temperature reducing system, safety protection device and automatic control device.
Pressure relief system - by pressure relief valve and orifice plate, through the actuator to achieve.
Desuperheating system: the method of spray desuperheating in the mixed pipeline is adopted. The force of desuperheating water on the spray head and the spring force are used to adjust the flow area of desuperheating water in the spray nozzle and the steam temperature is controlled by the opening of the feed water regulating valve controlled by the actuator.
Safety protection device: it is directly realized by impulse safety device (composed of main safety valve and impulse safety valve) or spring safety valve. When the secondary pressure exceeds the specified value, the steam in excess of the pressure will be discharged to the atmosphere, so as to keep the secondary pressure within the allowable value.
The automatic control device is equipped with the RKG - □ □ □ steam pressure and temperature control device produced by our factory. The new steam can keep the secondary steam parameters at the required stable value through this device.

1. Structural characteristics
The device is composed of pressure reducing system, temperature reducing system, safety protection device and automatic control device.
Pressure relief system - by pressure relief valve and orifice plate, through the actuator to achieve.
Desuperheating system: the method of spray desuperheating in the mixed pipeline is adopted. The force of desuperheating water on the spray head and the spring force are used to adjust the flow area of desuperheating water in the spray nozzle and the steam temperature is controlled by the opening of the feed water regulating valve controlled by the actuator.
Safety protection device: it is directly realized by impulse safety device (composed of main safety valve and impulse safety valve) or spring safety valve. When the secondary pressure exceeds the specified value, the steam in excess of the pressure will be discharged to the atmosphere, so as to keep the secondary pressure within the allowable value.
The automatic control device is equipped with the RKG - □ □ □ steam pressure and temperature control device produced by our factory. The new steam can keep the secondary steam parameters at the required stable value through this device.

2. Main performance indexes
1. Inlet steam pressure P1 ≤ 10MPa, temperature T1 ≤ 540 ℃;
2. Outlet flow Q: the change range of outlet flow Q of temperature and pressure reducing device is 10% - 110%, which can realize ideal regulation.
3. The change range of outlet steam pressure P2 is:
When P2 ≤ 0.98mpa, the variation range of P2 is P2 ± 0.04MPa;
When 0.982 < 3.82MPa, the change range of P2 is P2 ± 0.06mpa;
When P2 > 3.82MPa, the change range of P2 is P2 ± 0.15Mpa.
4. The regulating range of outlet steam temperature T2 is T2 ± 4 ℃.
5. During normal operation of the device, measure the noise at the place one meter downstream of the temperature and pressure reducing valve and one meter away from the pipe wall, and the noise level shall not be greater than 85 dB.

3. Scope of supply
The scope of supply of high temperature and high pressure desuperheating and pressure reducing device is within the mark, mainly including:
1. Pressure reducing system: temperature and pressure reducing valve, throttle orifice, etc;
2. Desuperheating system: feed water regulating valve, umbrella shaped automatic adjustable nozzle in mixing pipe, throttle valve, etc;
3. Safety system: safety valve, check valve, etc;
4. Pipeline system: steam pipe, transition pipe, desuperheating pipe, mixing pipe, etc;
5. Supporting accessories: stop valve, bimetal thermometer and connecting pipe, pressure gauge and three-way valve, elbow, joint, flange, gasket, bolt, nut, washer, etc.

4. Specifications and dimensions of each series of high temperature and high pressure desuperheating and pressure reducing device

Specification and size table of each series of high temperature and high pressure desuperheating and reducing device (table 15)

Number	General schedule	Pressure relief valve	Steam pipe DW×S	Main safety valve inlet and outlet DN2×DN3	Feed water regulating valve DN4	Outline size								Weight (kg)
						b	H	h	h1	h2		L
1	GJWY01-001MX	100	Φ219×11	150×200	20	220	230	200	532/587	263/300		4360		1262
2	GJWY 01-002MX		Φ273×13						557/612	263/327		4765		1340
3	GJWY 01-003MX			200×300		270			638/699					1514
4	GJWY 01-004MX		Φ325×16						688/749	289/353		5035		1704
5	GJWY 01-005MX	150					260	240				4610		1692
6	GJWY 01-006MX	100	Φ377×18				230	200	713/774	315/379		5165		1825
7	GJWY01-007MX	150					260	240				5010		2018
8	GJWY 01-008MX			250×350		300			782/840					2263
9	GJWY 01-009MX	100					230	200				5165		2275
10	GJWY 01-010MX		Φ426×20						807/865	339/403		5690		2195
11	GJWY 01-011MX	150					260	240				5265		2352
12	GJWY 01-012MX	225					330	320				4860		2685
13	GJWY01-013MX	100	Φ530×10				230	200	863/921	391/455		6435		2876
14	GJWY01-014MX	150					260	240					6010	3065
15	GJWY01-015MX	225					330	320					5605	3368
16	GJWY01-016MX	100	Φ219×11	150×200	32	220	230	200	532/587		263/300		4360	1257
17	GJWY01-017MX		Φ273×13						557/612		263/327		4765	1411
18	GJWY01-018MX			200×300		270			638/699					1580
19	GJWY01-019MX		Φ325×16						688/749		289/353		5035	1770
20	GJWY01-020MX	150					260	240					4610	1758
21	GJWY01-021MX	100	Φ377×18				230	200	713/774		315/379		5165	1891
22	GJWY01-022MX	150					260	240					5010	2084
23	GJWY01-023MX			250×350		300			782/840					2329
24	GJWY01-024MX	100					230	200					5165	2341
25	GJWY01-025MX		Φ426×20						807/865		339/403		5690	2225
26	GJWY01-026MX	150					260	240					5265	2418
27	GJWY01-027MX	225					330	320					4860	2750
28	GJWY01-028MX	100	Φ530×10				230	200	863		391		6435	2940
29	GJWY01-029MX	150					260	240					6010	3131
30	GJWY01-030MX	225					330	320					5605	3434
31	GJWY01-031MX	100	Φ630×10				230	200	913		441		6690	3085
32	GJWY01-032MX	150					260	240					6270	3288
33	GJWY01-033MX	225					330	320					6360	3627
Note: there are pn4 and PN10 specifications for no.1-28 main safety valve and impulse safety valve. Where the safety device is pn4 series, add the letter "a" such as "gjwy01-001amx", H1 and H2 take the molecular value; where the safety device is PN10 series, add the letter "B" such as "gjwy02-001mx", H1 and H2 take the denominator value; Starting with serial number 29, the safety device has only one specification of pn4.

Table sixteen

Number	General schedule	Pressure relief valve	Steam pipe DW×S	Main safety valve inlet and outlet DN2×DN3	Feed water regulating valve DN4	Outline size						Weight (kg)
Number	General schedule	Pressure relief valve	Steam pipe DW×S	Main safety valve inlet and outlet DN2×DN3	Feed water regulating valve DN4	b	H	h	h1	h2	L	Weight (kg)
1	GJWY02-001MX	100	Φ426×20	250×350 Two sets	20	300	230	200	807/865	339/403	5690	3069
2	GJWY02-002MX	150					260	240			5265	3235
3	GJWY02-003MX	225					330	320			4860	3385
4	GJWY02-004MX	100	Φ530×10				230	200	863	391	6435	3576
5	GJWY02-005MX	150					260	240			6010	3765
6	GJWY02-006MX	225			32		330	320			5605	4068
7	GJWY02-007MX	100	Φ426×20				230	200	807/865	339/403	5690	2895
8	GJWY02-008MX	150					260	240			5265	3052
9	GJWY02-009MX	225					330	320			4860	3385
10	GJWY02-010MX	100	Φ530×10				230	200	863	391	6435	3576
11	GJWY02-011MX	150					260	240			6010	3765
12	GJWY02-012MX	225					330	320			5605	4068
13	GJWY02-013MX	100	Φ630×10				230	200	913	441	6690	3785
14	GJWY02-014MX	150					260	240			6270	4088
15	GJWY02-015MX	225					330	320			6360	4527
16	GJWY02-016MX	150	Φ720×10				260	240	965	492	7215	5255
17	GJWY02-017MX	225	Φ720×10				330	320	965	492	6810	5360
18	GJWY02-018MX	150	Φ830×10				260	240	1020	547	7475	5210
19	GJWY02-019MX	225	Φ830×10				330	320	1020	547	7070	5315

Note: No. 1-3 and No. 7-9. There are two specifications of safety device: pn4 and PN10. If the safety device is pn4, add the letter "a" to the number, such as "gjwy02-001amx"

The values of H1 and H2 take the molecular value; where the safety device is PN10 specification, add the letter "B" after the number, such as "gjwy02-002bmx", H1 and H2 take the denominator value; other devices only have pn4 specification.

Specification and dimension table of each series of high temperature and high pressure desuperheating and reducing device (Table 17)

Number	General schedule	Temperature and pressure reducing valve	Steam pipe DW×S	Main safety valve inlet and outlet DN2×DN3	Feed water regulating valve DN4	Outline size							Weight (kg)
Number	General schedule	Temperature and pressure reducing valve	Steam pipe DW×S	Main safety valve inlet and outlet DN2×DN3	Feed water regulating valve DN4	b	H	h	h1	h2	L	L1	Weight (kg)
1	GWY01-001MX	100	Φ219×11	150×200	20	220	230	200	532/587	263/300	4360	3410	1262
2	GWY01-002MX		Φ273×13	150×200		220			557/612	263/327	4765	3815	1340
3	GWY01-003MX		Φ273×13	200×300		270			638/699	263/327	4765	3815	1514
4	GWY01-004MX		Φ325×16						688/749	289/353	5035	4085	1704
5	GWY01-005MX	150	Φ325×16				260	240	688/749	289/353	4610	3510	1692
6	GWY01-006MX	100	Φ377×18				230	200	713/774	315/379	5165	4215	1825
7	GWY01-007MX	150					260	240	713/774		5010	3910	2018
8	GWY01-008MX	150		250×350		300	260	240	782/840		5010	3910	2263
9	GWY01-009MX	100					230	200	782/840		5165	4215	2275
10	GWY01-010MX	100	Φ426×20				230	200	807/865	339/403	5690	4740	2195
11	GWY01-011MX	150					260	240			5265	4165	2352
12	GWY01-012MX	225					330	320			4860	3130	2685
13	GWY01-013MX	100	Φ530×10				230	200	863/921	391/455	6435	5485	2876
14	GWY01-014MX	150					260	240			6010	4910	3065
15	GWY01-015MX	225					330	320			5605	3875	3368
16	GWY01-016MX	100	Φ219×11	150×200	32	220	230	200	532/587	263/300	4360	3410	1257
17	GWY01-017MX		Φ273×13	150×200		220			557/612	263/327	4765	3815	1411
18	GWY01-018MX		Φ273×13	200×300		270			638/699	263/327	4765	3815	1580
19	GWY01-019MX		Φ325×16						688/749	289/353	5035	4085	1770
20	GWY01-020MX	150	Φ325×16				260	240	688/749	289/353	4610	3510	1758
21	GWY01-021MX	100	Φ377×18				230	200	713/774	315/379	5165	4206	1891
22	GWY01-022MX	150					260	240	713/774		5010	3910	2084
23	GWY01-023MX	150		250×350		300	260	240	782/840		5010	3910	2329
24	GWY01-024MX	100					230	200	782/840		5165	4215	2341
25	GWY01-025MX	100	Φ426×20				230	200	807/865	339/403	5690	4740	2225
26	GWY01-026MX	150					260	240			5265	4165	2418
27	GWY01-027MX	225					330	320			4860	3130	2750
28	GWY01-028MX	100	Φ530×10				230	200	863	391	6435	5485	2940
29	GWY01-029MX	150					260	240			6010	4910	3131
30	GWY01-030MX	225					330	320			5605	3875	3434
31	GWY01-031MX	100	Φ630×10				230	200	913	441	6690	5740	3085
32	GWY01-032MX	150					260	240			6270	5170	3288
33	GWY01-033MX	225					330	320			6360	4630	3627
Note: there are pn4 and PN10 specifications for no.1-28 main safety valve and impulse safety valve. Where the safety device is pn4 series, add the letter "a" such as "gwy01-001amx", H1 and H2 take the molecular value; where the safety device is PN10 series, add the letter "B" such as "gwy02-001mx", H1 and H2 take the denominator value; Starting with serial number 29, the safety device has only one specification of pn4.

Table 18

Number	General schedule	Temperature and pressure reducing valve	Steam pipe DW×S	Main safety valve inlet and outlet DN2×DN3	Feed water regulating valve DN4	Outline size							Weight (kg)
Number	General schedule	Temperature and pressure reducing valve	Steam pipe DW×S	Main safety valve inlet and outlet DN2×DN3	Feed water regulating valve DN4	b	H	h	h1	h2	L	L1	Weight (kg)
1	GWY02-001MX	100	Φ426×20	250×350 两套	20	300	230	200	807/865	339/403	5690	4740	3069
2	GWY02-002MX	150					260	240			5265	4165	3235
3	GWY02-003MX	225					330	320			4860	3130	3385
4	GWY02-004MX	100	Φ530×10				230	200	863	391	6435	5485	3576
5	GWY02-005MX	150					260	240			6010	4910	3765
6	GWY02-006MX	225			32		330	320			5605	3875	4068
7	GWY02-007MX	100	Φ426×20				230	200	807/865	339/403	5690	4740	2895
8	GWY02-008MX	150					260	240			5265	4165	3052
9	GWY02-009MX	225					330	320			4860	3130	3385
10	GWY02-010MX	100	Φ530×10				230	200	863	391	6435	5485	3576
11	GWY02-011MX	150					260	240			6010	4910	3765
12	GWY02-012MX	225					330	320			5605	3875	4068
13	GWY02-013MX	100	Φ630×10				230	200	913	441	6690	5740	3785
14	GWY02-014MX	150					260	240			6270	5170	4088
15	GWY02-015MX	225					330	320			6360	4630	4527
16	GWY02-016MX	150	Φ720×10				260	240	965	492	7215	6115	5255
17	GWY02-017MX	225	Φ720×10				330	320	965	492	6810	5080	5360
18	GWY02-018MX	150	Φ830×10				260	240	1020	547	7475	6375	5210
19	GWY02-019MX	225	Φ830×10				330	320	1020	547	7070	5340	5315

Note: No. 1-3 and No. 7-9. There are two specifications of safety device: pn4 and PN10. If the safety device is pn4, add the letter "a" to the number, such as "gwy02-001amx"

The values of H1 and H2 take the molecular value; where the safety device is PN10 specification, add the letter "B" after the number, such as "gwy02-002bmx", H1 and H2 take the denominator value; other devices only have pn4 specification.

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High temperature and high pressure desuperheating and reducing device