Control Steam

Control is broadening its horizons later this month, when the release of its Ultimate Edition marks its first time on Steam.The game first released precisely one year before its planned Steam debut, and while it released for PC alongside PlayStation 4 and Xbox one, it was an exclusive for the Epic Games Store, a business decision that drew frustration from some PC players. Document language reference number download; 85 & 1000 Series Control Valves: English: SB-P414-07-US: Download PDF: Applications Overview for the steam and condensate loop.

Design of steam control valves and their K_v values

The procedure below can be used for proper design of steam process control valves and their correct flow factors - K_v.

1. Determine Pressure Coefficient - P_coef

Start with the absolute pressure before the control valve and the actual pressure drop available over the valve and determine the pressure coefficient - P_coef - from the table below.

P_coef = pressure drop / specific volume

Note! The pressure drop can not exceed critical pressure drop which is approximately 42% of the inlet pressure.

For full table - rotate the screen!

P_coeff
Absolute Pressure - P_in - (bar)	Specific Volume - v - (m³/kg)	Pressure drop (bar)
Absolute Pressure - P_in - (bar)	Specific Volume - v - (m³/kg)	0.5	1	1.5	2	2.5	3	3.5	4	4.5	5	5.5	6	6.5	7	7.5
1	1.69	0.30
2	0.89	0.56	1.12
3	0.61	0.82	1.64	2.46
4	0.45	1.11	2.22	3.33	4.44
5	0.38	1.32	2.63	3.95	5.26	6.58
6	0.32	1.56	3.13	4.69	6.25	7.81	9.38
7	0.27	1.85	3.70	5.56	7.41	9.26	11.1	13.0
8	0.24	2.08	4.17	6.25	8.33	10.42	12.5	14.6	16.7
9	0.21	2.38	4.76	7.14	9.52	11.90	14.3	16.7	19.1	21.4
10	0.19	2.63	5.26	7.89	10.53	13.16	15.8	18.4	21.1	23.7	26.3
11	0.18	2.78	5.56	8.33	11.11	13.89	16.7	19.4	22.2	25.0	27.8	30.6
12	0.16	3.13	6.25	9.38	12.50	15.63	18.7	21.9	25.0	28.1	31.3	34.4	37.5
13	0.15	3.33	6.67	10.00	13.33	16.67	20.0	23.3	26.7	30.0	33.3	36.7	40.0	43.3
14	0.14	3.57	7.14	10.71	14.29	17.86	21.4	25.0	28.6	32.1	35.7	39.3	42.9	46.4	50.0
15	0.13	3.85	7.69	11.54	15.38	19.23	23.1	26.9	30.8	34.6	38.5	42.3	46.2	50.0	53.9	57.7

Example - Pressure Coefficient

In a steam system with 9 bar gauge pressure the absolute pressure is 10 bar. If a pressure drop of 3.5 bar is acceptable and suitable for the steam consumer, the pressure coefficient P_coef should be 18.4.

2. Determine Flow Factor - K_v

Select the pressure coefficient - P_coef - column closest possible to the actual pressure coefficient calculated in step 1.

Follow the column down until reaching the appropriate actual flow value. Interpolate between values if necessary. Cfx manager free download mac.

Go left in the table to find the actual flow factor K_v.

Steam Flow (kg/h)
K_v	Pressure Coefficient - P_coeff
K_v	1	1.25	1.56	1.95	2.44	3.05	3.81	4.77	5.96	7.45
0.01	0	0	0	0	0	1	1	1	1	1
0.02	0	1	1	1	1	1	1	1	1	1
0.02	1	1	1	1	1	1	1	2	2	2
0.03	1	1	1	1	2	2	2	2	3	3
0.05	2	2	2	2	3	3	3	4	4	4
0.08	2	3	3	3	4	4	5	5	6	7
0.11	4	4	5	5	6	6	7	8	9	10
0.17	5	6	7	8	8	9	11	12	13	15
0.26	8	9	10	11	13	14	16	18	20	22
0.38	12	14	15	17	19	21	24	27	30	33
0.58	18	20	23	26	29	32	36	40	45	50
0.86	27	31	34	38	43	48	54	60	67	75
1.3	41	46	51	57	64	72	80	90	100	112
2.0	62	69	77	86	96	108	120	135	151	168
2.9	93	103	116	129	145	162	181	202	226	253
4.4	139	155	174	194	217	242	271	303	339	379
6.6	208	233	260	291	325	364	407	455	508	568
9.9	312	349	390	436	488	546	610	682	763	853
14.8	468	524	586	655	732	818	915	1023	1144	1279
22.2	703	786	878	982	1098	1228	1373	1535	1716	1918
33.3	1054	1179	1318	1473	1647	1841	2059	2302	2574	2877
49.9	1581	1768	1976	2210	2471	2762	3088	3453	3860	4316
74.8	2372	2652	2965	3315	3706	4143	4632	5179	5790	6474
112	3558	3978	4447	4972	5559	6215	6948	7769	8686	9711
168	5336	5966	6671	7458	8338	9322	10423	11653	13028	14566
253	8005	8949	10006	11187	12507	13983	15634	17479	19543	21849
379	12007	13424	15009	16780	18761	20975	23451	26219	29314	32774
568	18010	20136	22513	25170	28141	31463	35177	39329	43971	49161
852	27016	30204	33769	37755	42212	47194	52765	58993	65956	73741
1278	40523	45307	50654	56633	63318	70791	79147	88489	98934	110612

For full table - rotate the screen!

Steam Flow (kg/h)
K_v	Pressure Coefficient - P_coeff
K_v	9.31	11.6	14.5	18.2	22.7	28.4	35.5	44.4	55.5	69.4
0.01	1	1	1	1	2	2	2	2	2	3
0.02	1	2	2	2	2	3	3	3	4	4
0.02	2	2	3	3	3	4	4	5	5	6
0.03	3	4	4	5	5	6	6	7	8	9
0.05	5	5	6	7	8	9	10	11	12	13
0.08	7	8	9	10	11	13	14	16	18	20
0.11	11	12	14	15	17	19	22	24	27	30
0.17	17	18	21	23	26	29	32	36	40	45
0.26	25	28	31	35	39	43	48	54	61	68
0.38	37	42	46	52	58	65	73	81	91	102
0.58	56	62	70	78	87	97	109	122	136	152
0.86	84	94	105	117	131	146	163	183	204	228
1.3	126	140	157	175	196	219	245	274	306	343
2.0	188	210	235	263	294	329	368	411	460	514
2.9	282	316	353	395	441	493	552	617	689	771
4.4	424	474	530	592	662	740	827	925	1034	1156
6.6	635	710	794	888	993	1110	1241	1388	1551	1734
9.9	953	1066	1191	1332	1489	1665	1862	2081	2327	2602
14.8	1430	1598	1787	1998	2234	2498	2792	3122	3491	3903
22.2	2145	2398	2681	2997	3351	3746	4189	4683	5236	5854
33.3	3217	3597	4021	4496	5026	5620	6283	7025	7854	8781
49.9	4825	5395	6032	6744	7540	8429	9424	10537	11781	13171
74.8	7238	8092	9047	10115	11309	12644	14137	15805	17671	19757
112	10857	12138	13571	15173	16964	18966	21205	23708	26506	29635
168	16285	18208	20357	22760	25446	28449	31808	35562	39759	44452
253	24428	27312	30535	34139	38169	42674	47711	53343	59639	66679
379	36642	40967	45803	51209	57254	64011	71567	80014	89459	100018
568	54963	61451	68704	76814	85880	96017	107350	120021	134188	150027
852	82445	92176	103056	115220	128820	144026	161025	180032	201282	225040
1278	123668	138265	154584	172831	193231	216038	241538	270048	301923	337560

Example - Determine Flow Factor

For a pressure coefficient P_coef = 18.2 and steam flow = 592 kg/h - the flow factor K_v is 4.4.

The formula used for the flow factor - K_v

The tables above are based on the formula: Audition mac free download.

K_v = m / (31.7 (dP / v)^1/2) (1)

where

m= steam flow (kg/h)

dP = pressure drop (bar)

v = specific volume of steam before control valve (m³/kg)

Control Steam Key

Steam Control Valve - K_v Calculator

Steam K_v calculator based on eq. 1:

m - steam flow (kg/h)

dp - pressure drop (bar)

v - specific volume of steam before valve (m³/kg)

Control Steam

Design of steam control valves and their K_v values