產品描述 Product Description

進口泄壓持壓閥、緊急開啟閥在傳動方式上采用了水力操作并能自動控制，即利用控制管路中的壓差自動開合，關閉主閥，使上游的壓力不超過某一設定值。閥體采用了全通道流線型設計，流體阻力小，密封性能好，自動啟閉性能靈敏。該閥的主要特點是既可以作泄壓閥，又可以作持壓閥。

The imported pressure relief and emergency opening valves adopt hydraulic operation and can be automatically controlled in transmission mode, that is, use the pressure difference in the control pipeline to automatically open and close, close the main valve, and ensure that the upstream pressure does not exceed a certain set value. The valve body adopts the full channel streamline design, with small fluid resistance, good sealing performance, and sensitive automatic opening and closing performance. The main feature of this valve is that it can be used as both a pressure relief valve and a pressure holding valve.

1.作泄壓閥時：可將水管中超過先導閥安全設定值的壓力釋放，并維持管中壓力于一定安全值以下，以防止管中高壓或突壓毀壞管線設備

   When using a pressure relief valve: it can release the pressure in the water pipe that exceeds the safety setting value of the pilot valve, and maintain the pressure in the pipe below a certain safety value to prevent high pressure or sudden pressure in the pipe from damaging pipeline equipment

2.作持壓閥時：可維持主閥上游供水壓力于某一設定直以上，以保障主閥上游的供水壓力

   When acting as a pressure holding valve, it can maintain the upstream water supply pressure of the main valve above a certain set point to ensure the upstream water supply pressure of the main valve

3.作緊急開啟閥時：裝于消防噴淋泵出水口處，當泵出水口處壓力上升某一設定值以上立即開啟

   When acting as an emergency opening valve: installed at the outlet of the fire sprinkler pump, immediately open when the pressure at the pump outlet rises above a certain set value

結構和主要零件材質 Structure and main component materials

泄壓持壓閥、緊急開啟閥由主閥、導閥、針閥、球閥、壓力表等組成，按不同通徑分有膜片和活塞式。由于導閥、針閥、球閥和壓力表等要用外接導管與主閥連接，所以統稱為導管控制系統

The pressure relief and holding valve and emergency opening valve are composed of main valve, pilot valve, needle valve, ball valve, pressure gauge, etc. They are divided into diaphragm and piston types according to different diameters. Due to the use of external conduits to connect guide valves, needle valves, ball valves, and pressure gauges to the main valve, they are collectively referred to as conduit control systems

主要零件材質 Main component materials

工作原理 working principle

泄壓/特壓閥安裝在泄水旁路上，即與主管道并聯安裝。只要上游壓力低于導閥設定值，導閥12關閉，上游壓力作用在主閥的膜片上方，使主閥維持關閉。一旦上游壓力逐漸上升到超過導閥12設定值的壓力，導閥12就會開啟，泄放主閥膜片上方的壓力水，此時主閥開啟，大量泄水降壓至設定值時，才緩慢平穩關閉，不產生二次水錘。適用于消除因流量供大于需而逐漸增大過高壓力，如（消防初期）消火栓系統、自動噴淋系統（水泵出口處）作泄壓閥時，球閥一般為關閉，必要時把球閥打開。作持壓閥時球閥為常閉或用絲堵換下。

The pressure relief/special pressure valve is installed on the drainage bypass, which is parallel to the main pipeline. As long as the upstream pressure is lower than the set value of the pilot valve, pilot valve 12 closes, and the upstream pressure acts on the diaphragm of the main valve, keeping the main valve closed. Once the upstream pressure gradually rises above the set value of pilot valve 12, pilot valve 12 will open and release the pressure water above the main valve diaphragm. At this time, the main valve will open, and a large amount of water will be released and depressurized to the set value before slowly and smoothly closing, without generating a secondary water hammer. Suitable for eliminating excessive pressure gradually increasing due to excessive flow supply. For example, in the early stages of fire protection, when the fire hydrant system and automatic sprinkler system (at the outlet of the water pump) are used as pressure relief valves, the ball valve is generally closed, and if necessary, the ball valve is opened. When working as a pressure holding valve, the ball valve should be normally closed or replaced with a plug.The hydraulic control valves are powered by the upstream and downstream pressure difference △ P, controlled by the pilot valve, allowing the diaphragm (piston) to operate under hydraulic differential, and are completely automatically adjusted by hydraulic pressure, thereby making the main valve disc fully open or fully closed, or in a regulated state. Fully closed state: When the water pressure at the inlet end of the main valve enters the valve body and control room respectively, and the ball valve outside the main valve is closed at the same time, the main valve is in a fully closed state; Fully open state: When the ball valve outside the main valve is fully open, all the water pressure in the control room is discharged to the atmosphere or downstream low-pressure area, so the main valve is in a fully open state; Floating state: Adjust the opening of the ball valve outside themain valve to balance the water flow between the needle valve and the ball valve. At this time, the main valve is in a floating state. (This is the working principle of the diaphragm type, and the same applies to the piston type.)

水力控制閥都是上下游壓力差△P為動力，由導閥控制，使膜片（活塞）在液壓差動下操作，完全由水力自動調節，從而使主閥閥瓣完全開啟或完全關閉，或處于調節狀態。全閉狀態：當主閥進口端水壓分別進入閥體及控制室，且主閥外部的球閥同時關閉，此時主閥處于全閉狀態；全開狀態：當主閥外部的球閥全開后，此時控制室內水壓全部被排到大氣或下游低壓區，所以主閥呈現全開狀態；浮動狀態：調節主閥外部的球閥開度，使水流經過針閥與球閥的水流達到平衡，此時主閥處于浮動狀態。

The hydraulic control valves are powered by the upstream and downstream pressure difference △ P, controlled by the pilot valve, allowing the diaphragm (piston) to operate under hydraulic differential, and are completely automatically adjusted by hydraulic pressure, thereby making the main valve disc fully open or fully closed, or in a regulated state. Fully closed state: When the water pressure at the inlet end of the main valve enters the valve body and control room respectively, and the ball valve outside the main valve is closed at the same time, the main valve is in a fully closed state; Fully open state: When the ball valve outside the main valve is fully open, all the water pressure in the control room is discharged to the atmosphere or downstream low-pressure area, so the main valve is in a fully open state; Floating state: Adjust the opening of the ball valve outside the main valve to balance the water flow between the needle valve and the ball valve. At this time, the main valve is in a floating state.

全關閉狀態：當主閥進口端水壓分別進入閥體及控制室，且主閥的外部球閥同時關閉，此時主閥處于關閉狀態。

Fully closed state: When the water pressure at the inlet end of the main valve enters the valve body and control room respectively, and the external ball valve of the main valve is closed at the same time, the main valve is in a fully closed state

全開啟狀態：當主閥外部的球閥全開后，此時控制室內水壓全部釋放到管路下游，而主閥也呈現為開啟狀態。

Fully open state: When the ball valve outside the main valve is fully open, all the water pressure in the control room is released to the downstream of the pipeline, and the main valve also shows a fully open state

浮動調節狀態：調節主閥外部的球閥開度，使進水端流向控制室的水流和控制室流向下游的水流達到平衡，此時主閥處于調節浮動狀態。

Floating adjustment state: Adjust the opening of the ball valve outside the main valve to balance the water flow from the inlet end to the control room and the water flow from the control room to the downstream. At this time, the main valve is in the floating adjustment state

流量示意圖 Flow diagram

安裝與調試 Installation and debugging

1、主閥最佳安裝方式是水平臥式安裝在泄水旁路上，閥蓋朝上，其它安裝方式也可達到操作功能，安裝前徹底清除管道內的雜物，要注意主閥體流向箭頭，遵循方向安裝。安裝后應確保沒有管路應力作用在閥體及閥內部件上。

2、對重要給水管路應安裝旁通閥。排水口最好通向大氣或完全敞開，如出口接管會影響泄水能力；為防止泄水時傷及人員和設備，則出口接管應將泄水引至安全排水的地方

3、主閥前應裝一只閘閥和一只過流器，主閥后可不裝閘閥。

4、球閥接在下水管道上，球閥一般為關閉，必要時把球閥打開，泄放主閥隔膜上方的壓力水，此時主閥閥盤呈現全開狀態，大量向下游泄水，結束后把球閥關閉，恢復泄水降壓。其他球閥全部打開。

5、導閥與導管控制系統已于出廠前裝配和調整完畢，如導閥出廠設定值不適合現場要求，可作如下調正，先松開導閥手輪下的鎖緊螺母，然后順時針擰動導閥手輪為增加壓力，反之為降低壓力，調好后鎖緊螺母。同時要調節針閥開度，使水流經過針閥與導閥的水流達到平衡，此時更佳地泄水降壓。（順時針擰動針閥手輪為減少開度，逆時針為增加開度。）

6、通水前的須沖洗管路系統。

7、外接管路過濾器要求定期清洗

8、重要管路要求安裝旁通閥。