ZZLP self-operated flow control valve

ZZLP type self-operated flow control valve
is a kind of energy-saving control device that does not need external driving energy, relies on the pressure of the medium itself to be adjusted as the power source and its medium pressure support, and automatically adjusts according to the set value. The self-operated regulating valve it sets detection, control, execution of multi-function in a valve, into an instrument control side system. The self-operated flow regulating valve is composed of low flow resistance single seat (sleeve) valve body, pressure balancing part, conductor and actuator. It is a standard valve product.

Self-operated flow control valve product features:
1, self-operated flow control valve without additional drive energy saving automatic control system. Low equipment cost;
2, the regulating valve structure is simple. Maintenance workload is small;
3, the set point is adjustable and wide range. Convenient for users to continuously adjust the flow within the set range;
4, the pressure balance mechanism is used in the valve, so that the regulating valve is sensitive, accurate control, and the allowable pressure difference is large.

The main technical parameters of self-operated flow regulating valve:

Nominal diameter DN		15	20	25	32	40	50	65	80	100	125	150	200	250
Rated flow coefficient Kvs		4	6.3	8	16	20	32	50	80	125	160	280	320	400
Nominal pressure MPa		1.6; 4.0
Large flow at effective pressure (m3/h)	0.02 MPa	1.5	2.5	3.5	5.5	9.0	14	22	36	55	70	125	180	250
Large flow at effective pressure (m3/h)	0.05MPa	2.5	3.5	5.5	9.0	12	22	36	55	85	110	180	-	-
Noise measurement factor Z value		0.6	0.6	0.6	0.55	0.55	0.5	0.5	0.45	0.4	0.35	0.3	0.2	0.2
Operating temperature ° C		140 or less
Operating temperature ° C		Hard seal with isolation tank ≤200										With isolation tank extension ≤200
Pressure balancing element		Bellows										Rolling diaphragm
Flange standard		ANSI, JIS, DIN, GB, JB(available by user)
Body material		Cast iron; Cast steel; Cast stainless steel
Spool material		Stainless steel, soft seal for stainless steel inlay rubber ring
Working pressure		Nominal pressure (note △Pmax and the relationship between working pressure and working temperature)

Self-operated flow control valve actuator parameters:

Effective area (cm2)	250	630
Effective pressure (MPa)	0.02; 0.05
Allow differential pressure (MPa) between upper and lower membrane chambers	0.4	0.15
Material	Film cover: steel galvanized; Diaphragm :EPDM or FKM clip fiber
Control lines, joints	Copper or steel pipe

Self-operated flow regulating valve performance indicators:

Control accuracy		± 5%
Allowable leakage (under specified test conditions)	Soft seal	4 x 10-4 rated capacity
	Hard seal	DN15 to 50	DN65 ~ 125	DN150 ~ 250
		10 Bubbles /min	20 bubbles /min	40 bubbles /min

Self-operated flow regulator allows differential pressure:

Nominal diameter DN		15	20	25	32	40	50	65	80	100	125	150	200	250
Allowable differential pressure △P(MPa)	PN16	1.6								1.5		1.2	1.0
	PN40	2.0

Self-operated flow control valve dimensions and weight:

Nominal diameter DN	15	20	25	32	40	50	65	80	100	125	150	200	250
L mm	130	150	160	180	200	230	290	310	350	400	480	600	730
B mm	121	212	238	238	240	240	275	275	380	380	295	325	372
φR mm	263										380
H mm	150										520
About weight (kg)	21	23	24	27	31	36	47	55	74	93	118	178	261

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