ZMAP/N-D (low-temperature type) pneumatic single seat regulating valve-Fornitore globale

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Regulating valve series

Self regulating valve series

Pneumatic control valve series

Electric control valve series

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Tangtou Industrial Zone, Jiangbei Street, Yongjia, Zhejiang

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ZMAP/N-D (low-temperature type) pneumatic single seat regulating valve

Caliber range: DN15-200mm Pressure range: PN1.6MPa Applicable temperature: -60~-250 ℃ Product application: ZMAP/N-D pneumatic thin film low-temperatur

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Product details

ZMAP/N-D Pneumatic Thin Film Low Temperature Regulating Valve

1、 Product Features

Product model: ZMAP/N-D

Product Name:(Low temperature type)Pneumatic single seat adjustmentvalve

ZMAP/N-D pneumatic thin film low-temperature regulating valve is a modified product of single and double seat regulating valves. It differs from the ambient temperature regulating valve in that it uses a long necked upper valve cover to keep the packing working at room temperature. Suitable for regulating media (such as liquid oxygen, liquid nitrogen, etc.) at low temperatures ranging from -60 to -250 ℃. To ensure adjustment accuracy, a valve positioner must be used.

Product Structure Principle

The ZMAP/N-D pneumatic low-temperature regulating valve consists of two parts: a pneumatic diaphragm actuator and low-temperature resistant single and double seat valves. The signal pressure from the regulator is input into the air chamber of the pneumatic diaphragm actuator, generating thrust. The valve core is driven by the connecting rod, and the change in the position of the valve core changes the flow cross-sectional area of the valve, achieving the regulation of the medium flow rate.

2、 Main technical indicators

Nominal Diameter DN	Single seat	20										25	32	40	50	65	80	100	125	150	200
	Double seat											25	32	40	50	65	80	100	125	150	200
rated flow Coefficient Kv	Single seat	0.08	0.12	0.20	0.32	0.50	0.80	1.2	2.0	3.2	5.0	8	12	20	32	50	80	120	200	280	450
	Double seat											10	6	25	40	63	100	160	250	400	630
flow characteristics		straight line						Straight line; equal percentage
Equipped with actuator model												ZMA -2		ZMA -3		ZMA -4			ZMA -5
itinerary		10						10				16		25		40			60
mode of action		Airtight (B), Airtight (K)
Spring pressure range KPa		Standard signal: 20-100; Other signals; 40～200； 20～60； 60~100

Installation and usage precautions

1. It should be installed vertically on a horizontal pipeline. In special cases where horizontal or inclined installation is required, support should generally be added. The circular board installed on the insulation box wall should be parallel to the insulation box wall.
2. It should be installed near the ground or floor for maintenance and repair purposes. For those equipped with valve positioners or handwheel mechanisms, it is even more important to ensure easy observation, adjustment, and operation.
3. Generally, a bypass pipeline is set up to switch to manual operation in case of automatic control system failure or maintenance of regulating valves, so as not to stop production.
4. When equipped with a handwheel mechanism, manual operation of the bypass pipeline can also be omitted, and it can also be used to limit the opening of the valve. When stopped, the handwheel mechanism must be restored to its original neutral position to facilitate the normal operation of the self-control system.
5. During installation, the flow direction of the medium should be consistent with the direction indicated on the valve body.
6. Before installing the regulating valve, the pipeline should be cleaned of dirt and welding slag. After installation, fully open the regulating valve, clean the pipelines, valves, etc., and test the sealing of each connection.

3、 Main external connection dimensions

Nominal diameter DN (mm)			15	20	25	32	40	50	65	80	100	125	150	200
A			230	280	280		325		410			495
Φ			135	235	235	255	280	310	345	370	430	470	550	660
Φ1			160	260	260	285	305	340	375	405	460	525	590	700
Φ2			190	290	290	315	335	370	410	440	490	560	630	740
n-Φ			6-12	8-14	8-14	8-14	8-16		10-16	10-18	12-18	16-18		20-18
Single seat	H	L	120	190	200	210	235	265	295	210	370	440	475	570
		H1=500	862	1006	1060	1066	1137	1152	1377	1390	1394
		H1=600	962	1106	1160	1166	1237	1252	1477	1490	1494
		H1=700	1062	1206	1260	1266	1337	1352	1577	1590	1594	1743	1751	1790
		H1=800	1162	1306	1360	1366	1437	1452	1677	1690	1694	1843	1851	1890
		H1=900	1262	1406	1460	1466	1537	1552	1777	1790	1794	1943	1951	1990
		H1=1000	1362	1506	1560	1566	1637	1652	1877	1890	1894	2043	2051	2090
		H1=1100										2143	2150	2190
		H1=1200										2243	2250	2290
	H2		32	58	112	118	129	144	178	191	195	243	251	290
Double seat	H	L			200	210	235	265	295	320	370	440	475	570
		H1=500			1065	1068	1147	1152	1387	1407	1419
		H1=600			1165	1168	1247	1252	1487	1507	1519
		H1=700			1265	1268	1347	1352	1587	1607	1619	1768	1778	1820
		H1=800			1365	1368	1447	1452	1687	1607	1719	1868	1878	1920
		H1=900			1465	1468	1547	1552	1787	1807	1819	1968	1978	2020
		H1=1000			1565	1568	1647	1652	1887	1907	1919	2068	2078	2120
		H1=1100										2168	2178	2220
		H1=1200										2268	2278	2320
	H2				117	120	139	144	188	208	208	268	278	320

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