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Overview
Gas filter is an important equipment in gas distribution system. In the process of gas transmission, in order to ensure the normal operation of gas transmission and distribution equipment and instruments such as regulators, valves, flowmeters, pressure gauges and other instruments and protect them from being destroyed, solid impurities in gas must be removed, and filters with filter accuracy that meet the requirements must be installed in front. Gas filter is suitable for natural gas, liquefied petroleum gas, city gas and other gases.
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Characteristics
Easy to install and operate, simple to use and maintain.
Filter accuracy is optional, can be equipped with a differential pressure gauge to show the degree of filth of the filter element.
Large filtration area, small fluid flow resistance.
Stainless steel filter element durable, easy to clean, reusable.
American standard filter, outlet flange for American standard flange, can be used with imported gas Roots flow.
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Use and Maintenance
Determine the discharge cycle according to the use conditions and discharge impurities in time.
When the blocking pressure of the filter element increases significantly, the filter should be disassembled or replaced in time. Generally, the filter should be cleaned once for 1000-1500h, and the filter should be replaced about 8000h. When cleaning or replacing the filter element, the filter inlet and outlet valve should be cut off first, and the gas in the filter should be replaced with nitrogen. After each cleaning, the leakage should be checked again, and the air in the filter can be reused after confirming that there is no leakage.
When the differential pressure gauge is configured, the inlet and outlet valves at both ends of the differential pressure gauge should be closed before ventilation, and the two inlet and outlet valves should be slowly opened after the air pressure is stable to avoid excessive pressure at the edge of the differential pressure gauge.
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Technical parameter
Table 1 Basic parameter
Type Specification
Technical Parameter | GDQ -40A | GDQ -50A | GDQ -80A | GDQ -100A | GDQ -150A | GDQ -200A | GDQ -250A | GDQ -300A |
Maximum flow(m³/h) | 70 | 160 | 400 | 650 | 1600 | 2500 | 4000 | 6500 |
Pressure loss(KPa) | 0.4 | 1.5 |
Nominal pressure | PN16, PN25, PN40 |
Filtration accuracy | 20μm(500 items) 40μm(300 items) 50μm(200 items) 130μm(120 items) |
Housing material | Q235R\20 | 16MnR，Q345B
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Screen material | Stainless steel wire mesh |
Operating temperature | -30℃～+80℃ |
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Overall Dimensions and Installation
FIG.1 External dimensions
Component Name：
1. Upper cover 2. Plug screw component 3. Housing 4. Differential pressure gauge 5. Drain socket 6. Small ball valve
Table 2 Dimensions data
Type specification | Nominal pressure | A | D | L | H | E | Flange connection size |
| K | n×Φ |
GDQ-25 | PN16～PN40 | Φ183 | Φ115 | 240 | 260 | 98 | Φ85 | 4×Φ14 |
GDQ-32 | PN16～PN40
| Φ183 | Φ140 | 240 | 260 | 98 | Φ100 | 4×Φ14 |
GDQ-40 | PN16～PN40 | Φ183 | Φ150 | 240 | 260 | 98 | Φ110 | 4×Φ18 |
GDQ-50 | PN16～PN40 | Φ240 | Φ165 | 300 | 388 | 225 | Φ125 | 4×Φ18 |
GDQ-80 | PN16～PN40 | Φ285 | Φ200 | 380 | 478 | 290 | Φ160 | 8×Φ18 |
GDQ-100 | PN16 | Φ340 | Φ220 | 440 | 590 | 355 | Φ180 | 8×Φ18 |
PN25～PN40 | Φ340 | Φ235 | 440 | 590 | 355 | Φ190 | 8×Φ22 |
GDQ-150 | PN16 | Φ445 | Φ285 | 560 | 820/980(H1) | 555 | Φ240 | 8×Φ22 |
| PN25～PN40 | Φ445 | Φ300 | 560 | 820/980(H1) | 555 | Φ250 | 8×Φ26 |
GDQ-200 | PN16 | Φ565 | Φ340 | 760 | 1050/1250(H1) | 740 | Φ295 | 12×Φ22 |
| PN25 | Φ565 | Φ360 | 760 | 1050/1250(H1) | 740 | Φ310 | 12×Φ26 |
| PN40 | Φ580 | Φ375 | 760 | 1050/1250(H1) | 740 | Φ320 | 12×Φ30 |
GDQ-250 | PN16 | Φ680 | Φ405 | 870 | 1380/1580(H1) | 870 | Φ355 | 12×Φ26 |
| PN25 | Φ680 | Φ425 | 870 | 1380/1580(H1) | 870 | Φ370 | 12×Φ30 |
| PN40 | Φ680 | Φ450 | 870 | 1380/1580(H1) | 870 | Φ385 | 12×Φ33 |
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Order Instructions
The ordering details are shown below, if you have any special requirements, please mark them specifically when placing your order.
FIG.2 Ordering information
