Surge Ancipating Valve

Surge anticipator Valve

The Model 550 Surge Anticipator Valve is indispensable for protecting pumps, pumping equipment and all applicable pipelines from dangerous pressure surges caused by rapid changes of flow velocity within a pipeline.
When pumping systems are started and stopped gradually, harmful surges do not occur. However, should a power failure take place, the abrupt stopping of the pump can cause dangerous surges in the system which could result in severe equipment damage. Power failure to a pump will usually result in a down surge in pressure, followed by an up surge in pressure. The surge control valve opens on the initial low pressure wave, diverting the returning high pressure wave from the system. In effect, the valve has anticipated the returning high pressure wave and is open to dissipate the damage causing surge. The valve will then close slowly without generating any further pressure surges.

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Features

Globe type fully bore

Pressure compared without & with surge anticipating valve

Surge simulation

Main valve

Main valve dimension

Main Valve Globe & Angle type

Main Valve Globe type Fully bore

Features

Standard Features	Optional Features	Typical Applications
1. Main valve 2. Needle valve 3. Ball valve 4. Strainer 5. Restriction 6. Lower pressure relief pilot 7. High pressure relief pilot	B. Ball valve G. Pressure Gauge P. Position indicator L. Limit switch	A. Inlet isolation valve B. Strainer C. Surge anticipating valve D. Outlet isolation valve

Globe type fully bore

• Drip-Tight, Positive Seating
• Service Without Removal From Line
• Threaded, Flanged or Grooved Ends
• Globe or Angle Pattern
• 100% Factory TestedThe Model GF 900 is a hydraulically operated, diaphragm actuated, globe or angle pattern valve. It consists of three major components: body, diaphragm assembly, and bonnet. The diaphragm assembly is the only moving part. The diaphragm assembly is guided top and bottom by a precision machined stem. It utilizes a non-wicking diaphragm of nylon fabric bonded with synthetic rubber. A resilient synthetic rubber seal match the seat, make drip-tight seal, when pressure is applied above the diaphragm. It is the valve of choice for system applications requiring remote control, pressure regulation, solenoid operation, rate of flow control, liquid level control or check valve operation. The rugged simplicity of design and pack less construction assure a long life of dependable, trouble-free operation. It is available in various materials and in a full range of sizes, with either threaded, flanged or grooved ends.Connection Standard
■ Flanged: ISO 7005-2 (ISO 10, 16 & 25)

Water Temperature
■ 0 – 80ºC

Working pressure
■ ISO PN 16: 16 bar
■ ISO PN 25: 25 bar

Pressure compared without & with surge anticipating valve

A. Without surge anticipating valve

B. With surge anticipating valve, surge decreased

Surge simulation

Pump works normally
Pump stop, flow keeps going forward because of moment, the pressure in pipeline just behind pump drops, cause lower pressure relief pilot to open, and the surge anticipating opens, which is called “anticipating”

Pump stop for a while, moment energy run out and flow keep still instantaneously, because of friction and resistance of flow rate in pipeline.

After pump stops, flow come back, surge happens , the pressure in pipeline behind pump rises, cause high pressure relief pilot open, main valve keep open.

Surge destroy the equipment’s and pipeline

The function of surge anticipating valve is torelease the surge to another way (atmosphere)

Main valve

Main valve work cases and principle

Flow curve of main valve fully open

Cavitation Guide Chart
This chart used as a guide to the proper selection of the pressure drop. When pressure drop is too big, velocity of flow across the seat will be very fast, then cavitation occurs, also with shaking and noises. the valve should be used in the green zone to guarantee continue working

Anti-cavitation Solution
The anti-cavitation mold is designed for application where there is a high potential for damage from cavitation, which provides optimum internal pressure control through a unique anti-cavitation trim design and relieve the damage of cavitation with multi-stage pressure reducing.

Main valve dimension

**Globe type full bore**
DN	L	H	H1*	ФK	S	W (Kg)
40	230	139	85	173	3/8″	14
50	230	139	85	173	3/8″	14
65	290	159	95	198	3/8″	19
80	310	179	102	226	3/8″	23
100	350	214	112	265	1/2″	32
125	400	278	127	307	1/2″	48
150	480	333	145	351	1/2″	68
200	600	407	172	436	3/4″	125
250	730	476	205	524	1″	200
300	850	526	232	606	1″	260
350	950	585	262	673	1″	405
400	1100	624	292	741	1″	560
500	1250	720	360	1002	1″	880
600	1450	835	425	1308	1″	1300
800	1850	1110	515	1755	1″	1950
1000	2250	1350	630	2231	1″	2456

**Globe type Reduced bore**
DN	L	H	H1*	ФK	S	W (Kg)
65	290	139	95	173	3/8″	15
80	310	159	102	198	3/8″	21
100	350	179	112	226	3/8″	27
125	400	214	127	265	1/2″	34
150	480	214	145	265	1/2″	37
200	600	333	172	351	1/2″	88
250	730	407	205	436	3/4″	144
300	850	476	232	524	1	231
350	980	526	262	606	1″	281
400	1100	526	292	606	1″	370
450	1200	624	325	741	1″	295
500	1250	624	360	741	1″	750
600	1450	720	425	1002	1″	1150
700	1650	835	460	1308	1″	1420
800	1850	835	515	1308	1″	1510
900	2050	1110	570	1755	1″	2185
1000	2250	1110	630	1755	1″	258
1200	2450	1350	750	2231	1″	3155

**Angle type**
DN	L1	H	H1	ФK	S	W (Kg)
50	115	139	85	173	3/8″	13
65	145	159	95	198	3/8″	18
80	105	179	102	226	3/8″	21
100	175	214	135	265	1/2″	31
125	200	278	145	307	1/2″	46
150	240	333	150	351	1/2″	65
200	300	407	203	436	3/4″	121
250	365	476	225	524	1	195
300	425	526	260	606	1″	253
350	490	585	305	673	1″	399

Main Valve Globe & Angle type

Main Valve Globe type Fully bore

Surge Ancipating Valve

Surge anticipator Valve

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