貨油艙壓力/真空閥，亦稱高速透氣閥或p/v閥,是現(xiàn)行油船和 化學(xué)品船必備的控制式透氣系統(tǒng)。

我公司系列DF-ISO型高速透氣閥，是新一代無振蕩無撞擊型 產(chǎn)品。油船和化學(xué)品船使用該產(chǎn)品具有Zui大的安全性，但操作中必須熟悉該使用手冊(cè)。

該使用手冊(cè)所用慣例：在該手冊(cè)中，下列圖標(biāo)用于為用戶提供 與該閥門使用有關(guān)的信息。

The pressure/vacuum valve for cargo ships is also called as highvelocity relief valve or P/V valve. It is a controlled ventingsystem necessary for oil tanker and chemical tanker.

The series of DF-ISO high velocity relief valve which areproduced by our company is a new generation production that iswithout vibration and anti-collision. It is the safest productionfor oil tanker and chemical tanker once operated by the Manual.

Items in the Manual: the following icons show some informationabout the valve.

A 警告用戶若未正確地遵守警告內(nèi)容，則可能會(huì)危害

項(xiàng)厶' 舶安全。

警告 It will threat the ships if the user does not abide by

Danger

the warnings.

① 提醒用戶若未正確地遵守注意事項(xiàng)的內(nèi)容，則可能會(huì)

產(chǎn)生不良的后果。

注 怒事項(xiàng) The adverse effects will appear if the user does not abideAttention u .

by the attention!

標(biāo)準(zhǔn)、用途及主要特性

I. Standard, Purposes and Main Characteristics

DF-ISO型壓力/真空閥(亦稱高速透氣閥)依據(jù)下述標(biāo)準(zhǔn)和規(guī)范 進(jìn)行設(shè)計(jì)、制造和試驗(yàn)。

1、 IMO.MSC/Circ.677《阻止火焰進(jìn)入油船液貨艙的裝置設(shè)計(jì)、 試驗(yàn)及安裝的修訂標(biāo)準(zhǔn)》；

2、 ISO15364《船舶與海上技術(shù)貨油艙壓力/真空閥》；

3、 IMO.MSC/Circl324;

參照EN12874-200K阻火器性能要求，試驗(yàn)方法和使用范圍》。

壓力真空閥作為油船和化學(xué)品船透氣的唯一出口和進(jìn)口，安裝 于每一艙室的頂端，當(dāng)液貨艙進(jìn)行裝貨作業(yè)時(shí)，壓力閥自動(dòng)垂直向上以大于30m/s的速度排出艙內(nèi)混合氣體；卸貨作業(yè)時(shí)，真空閥自 動(dòng)向艙內(nèi)補(bǔ)充空氣,使液貨艙免于超壓和失壓。按照上述標(biāo)準(zhǔn)制造的壓力真空閥，即使在工作狀態(tài)下,也能阻止火焰進(jìn)入液貨艙。

本公司貨油艙壓力/真空閥的試驗(yàn)在經(jīng)國(guó)家主管機(jī)關(guān)認(rèn)可的實(shí) 驗(yàn)室進(jìn)行，并依據(jù)上述標(biāo)準(zhǔn)通過了下列所有項(xiàng)目的試驗(yàn)，取得了中國(guó)船級(jí)社和部分國(guó)外船級(jí)社的認(rèn)可。

1、耐火試驗(yàn)；2、回燃試驗(yàn)；3、冰凍試驗(yàn)；4、腐蝕試驗(yàn)；

5、流動(dòng)試驗(yàn)。

The DF-ISO type pressure/vacuum valve (liigh velocity reliefval- ve)is designed, manufactured and tested by the followingstandards and stipulations:

1. IMO.MSC/Circ. 677 Revised Standards of Designing, Testing andInstalling the Device tliat can Stop the Flame into the Li Tank;

2.ISO15364 Sliips and Marine Teclmology-Pressure/Vhcuum Valvefor Cargo Tank;

3.IMO.MSC/Circl324；

Reference EN12874-2001 Re Testing Methods and

Usage Scope about the Flame Arrester.

As the sole breathable port of oil tanker and chemical tanker,the pressure vacuum valve is installed on the top of eachcompartment. When the hydraulic compartment is loading cargo, thepressure valve effluent mixed gas at a speed of more than 30 m/svertically upwards. When discharge cargo, the vacuum valve add airto the cabin automatically to prevent the hydraulic tank fromoverpressure and pressure loss. Pressure vacuum valve made inaccordance with the above standards, can prevent the flame into thehydraulic tank even under the working condition.

The cargo-oil-tank-pressure/vacuum-valve test of our company isexamined in the laboratory which is approved by the nationalcompetent authority, and we passed all the tests of following itemsin accordance with the above standard, obtained the approval ofchina classification society(CCS) and some foreign classificationsocieties.

l.Fire Resistant Test; 2. Re-burning Test; 3. Frozen Test; 4.Corrosion Resistant Test; 5. Flowing Test.

系列 DF?ISO 型壓力真空閥 DF50、DF65、DF80、DF100、DF125、DF150、DF200、DF250,由于壓力閥閥門的特殊設(shè)計(jì)，只有當(dāng)系統(tǒng)壓 力穩(wěn)定地達(dá)到設(shè)定開啟壓力時(shí),閥門才會(huì)完全打開。在正常的裝載速率下，閥門開啟后，管路和艙內(nèi)系統(tǒng)壓力即下降20吩50%左右后 能穩(wěn)定工作和保持30m/s的出口流速。工作中，不會(huì)造成系統(tǒng)壓力突然增加和減少。在允許的Zui小到Zui大流量的裝貨速率下,高速出 口閥門不會(huì)發(fā)生撞擊和振蕩。該系列閥門還可以安裝一個(gè)磁力控制機(jī)構(gòu)，來處理航行中閥門振顫的問題，可以將航行中蒸氣損失降 到Zui低。

系列DF-ISO型壓力真空閥在80%設(shè)定工作壓力下，其泄漏量 基本為零，可以選擇用于裝載要求零泄漏的貨品，是國(guó)際上少有的Zui先進(jìn)的閥門。

系列閥門在-20°C-+60°C的環(huán)境下都能正常工作,閥口結(jié)冰時(shí)， 經(jīng)破冰后也即能正常工作。

As to the DF-ISO series pressure vacuum valves DF50, DF65,DF80,DF125,DF150,DF200,DF250, the valve will open completely onlywhen the system pressure reached the setting opening pressurebecause of the special designing of the pressure valve. Under thenormal load rate, after the valve open, the pressure of line andthe cabin system will fall by 20% to 50%, then work steadily andmaintain the flow rate of 30m/s. In work, the system pressure won'tincrease or decrease suddenly. The high-speed export valve won' tbe impacted and shocked under the allowed rate of loading. Thisseries of valves also can install a magnetic control mechanism,which can deal with the problem of valve vibration on the voyageand can minimum the steam loss.

The basic leakage of DF - ISO series pressure vacuum valve iszero when the wording pressure is set at 80%, and can be chosen toload the goods which require zero leakage. This series of pressurevacuum valve is one of the most advanced products in the world.

The series of valves can work under -20 °C to +60 °C regularly,when the valves freeze, they can work regularly aftericebreaking.

DF-ISO型壓力真空閥冰凍試驗(yàn)時(shí)轉(zhuǎn)動(dòng)頂升手柄
(11),手動(dòng)破冰厚度不超過5mm,且破冰后應(yīng)清
除冰塊閥門才能正常工作。

Turn the handle (11) while do the frozen test of the DF-ISO typepressure/vacuum valve, then

break the ice that is less than 5mm by manual device. The valveperformances normally after

cleaning all the ice.

基本結(jié)構(gòu)、尺寸參數(shù)及工作原理

II. Basic Structure, Dimension Parameter and OperatingPrinciple

系列DF-ISO型壓力真空閥采用標(biāo)準(zhǔn)化的設(shè)計(jì)制造，每個(gè)零部 件都標(biāo)準(zhǔn)化，能互換和通用。

Series DF-ISO pressure/vacuum valve adopts standardized design,each fittings and parts are standardized so that they caninterchange and use for all purposes.

2.1 DF.ISO型壓力真空閥的基本結(jié)構(gòu)見圖一。

2. IFigure 1 is the basic structure of DF-ISO pressure/vacuumvalve; Picture 4 is a high velocity relief valve with gas freeingcover.

 

2.2 DF.ISO型壓力真空閥的主要尺寸參數(shù)見表一。

2.2Table 1 is the dimension parameter of DF-ISO pressure/vacuumvalve.

表一 Table 1

DF250

DN250

,250mm

320

350

395

485

860

12 x 022

DF200

DN200

200mm

258

295

340

455

850

8x 018

DF150

DN150

150mm

202

225

265

710

DF125

DN125

3125mm

178

200

240

665

DF100

DN100

100mm

148

170

210

565

4x 018

DF80

DN80

80mm

128

150

190

285

535

DF65

DN65

65mm

110

130

160

260

4x如4

DF50

DN50

50mm

90

140

4x <I)14

型號(hào)

Type

通徑DN

Drift diameter

安裝管徑

Pipe diameter

D2

DI

D

L

H

裝配孔 assembly hole

注：法蘭執(zhí)行標(biāo)準(zhǔn)：GB2501-89, DN50-DN150公稱工作壓力 0.6Mpa,DN200、DN250 公稱工作壓力L6MPa(等同ISO2084-1974. ISO2441-1975) o

Remarks: flange executive standards: GB2501-89, DN50-DN150,nominal pressure is 0.6Mpa; DN200、DN250, nominal pressure is1.6Mpa(is equal to ISO2084-1974 JSO2441-1975).

2.3 DF.ISO型高速透氣閥的主要零部件見表二。

2.3 Table 2 is main parts of the DF-ISO pressure/vacuumvalve.

表二 Table 2

序號(hào) serial No.

部件名稱

parts

數(shù)量

材質(zhì)

material

大于10kg的零件 parts over 10kg

備注

remark

1

P 閥下體 P-valve base

ZG200-400

DN100~DN250

2

P 閥閥座 P-valve seat

0Crl8Ni9

DN200、DN250

3

P 閥上體(甲)P-valve body (A)

4

P 閥上體(乙)P-valve body (B)

DN150-DN250

5

P閥閥瓣（導(dǎo)流器）

無 nothing

部件名稱 parts

材廩

6

配重塊 matching block

7

P 閥閥桿 P-valve pole

8

頂升軸 Jacking shaft

9

頂升凸輪Lifting cam

通用件 GM parts

10

定位板 Positioning plate

11

頂升手柄Lifting handle

12

襯套 Bushing

選擇娜 choose to use

13

出廠銘牌Nameplate

14

頂升桿 Lifting lever

15

V 閥閥體 V-valve body

16

V 閥閥瓣 V-valve disc

17

V 閥閥座 V-valve seat

18

防火網(wǎng)小隔環(huán) small flame screen spacer ring

19

防火網(wǎng) flame screen (30 目)

00Crl7Nil4Mo2

one for both the top and the bottom

20

防火網(wǎng)大隔環(huán) big flame screen spacer ring

21

防火網(wǎng)壓蓋 flame screen gland

22

驅(qū)氣蓋或V閥閥蓋 air-removal cover or V-valve cover

選擇使用

choose to use

注：主體材料船東可選擇鑄鋼、鑄304、鑄304L、鑄316L,內(nèi)部材料等同或高一檔。如用于化學(xué)品船，其材料選擇必須等同船體材料。

Remarks: the ship-owner can choose cast steel, cast 304, cast304L and cast 316L. The similar material shall be selected onceused for the chemicals tanker. The inner material must equal tothis or one level above. If is use in the chemical ship, thematerial must equate the hull material.

2.4DF-ISO型壓力真空閥的主要技術(shù)參數(shù)見表三。

2.4 Table 3 are the technical parameter of DF-ISOpressure/vac- uum valve.

主要技術(shù)參數(shù) Main technical parameters :

表三Table 3

型號(hào) specification

設(shè)計(jì)開啟壓力 setting opening pressure (kPa)

額定工作壓力

Rated working pressure (kPa)

流量(nf/h) flow rate

MESG 值 mm

壓力閥 pressure valve 出口流速 exit velocity (m/s)

壓力閥 pressure valve

真空閥 vacuum valve

14.0-20.0

-3.5--7.0

21.0

-7.0

>300

NO.65

>30

>400

14.0 ?20.0

>600

>500

部.65

>800

>1000

>2500

>2000

>3000

>3500

2.5 DF-ISO-60型壓力真空閥結(jié)構(gòu)和上述型號(hào)完全相同，其設(shè)定開啟壓力為60.0kPa,主要用于環(huán)氧丙烷類貨物的裝載，確保艙內(nèi) 貨品在80%的設(shè)定壓力下零泄漏，并在80%以上的壓力下自動(dòng)釋放，平衡艙壓。該閥為保險(xiǎn)閥，不用于裝載作業(yè),如配有真空閥，可 以進(jìn)行卸載。每個(gè)液貨艙應(yīng)各裝一個(gè)DF-ISO型和一個(gè)DF-ISO-60型壓力真空閥。

2.5 The structure ofDF-ISO-60 type pressure vacuum valve isexactly the same as the above types. Setting the opening pressureat 60pa, this type is mainly used in the loading of epoxy propanegoods, can ensure zero leakage under the setting pressure of 80%,and release the pressure automatically to balance the cabinpressure under the pressure of more than 80%. The valve isinsurance valve, which is not used for loading operation. If isdeployed with vacuum valve, it can be unloaded. Each hydraulic tankshould be installed a DF-ISO type and a DF- ISO-60 type pressurevacuum valve.

DF-ISO-60型主要參數(shù)見表四。

The main parameters of DF-ISO-60 is listed in Table 4.

表四Table 4

額定工作壓力 Max working pressure (kPa)

壓力閥 出口通徑 diameter of the exit for pressure valve

MESG 值

mm

連接 管徑

Connection pipe diameter (mm)

真空閥 vacuum valvs

DF- ISO -60

W60.0

35-7.0

60.0

50mm

30.65

DN80 DN100 DN125

船東和設(shè)計(jì)院所要求壓力/真空閥的設(shè)計(jì)開啟壓力是不一樣的，應(yīng)由制造商提供的透氣系統(tǒng) 壓力降計(jì)算確定。

選擇閥門時(shí)以制造商提供的壓力、流量曲線圖 為準(zhǔn)。

The operating pressures for ship-owner and Design Institute aredifferent. Shall be provided by the manufacturer of the ventingsystem pressure drop calculated and determined. Please select thevalve

according to the pressure and graph of flow rate which providedby manufacturer.

注：⑴上述流量為21。。(70筆)，壓力1013.25hpa,密度為1.29kg/m3 的標(biāo)準(zhǔn)空氣；

⑵閥門的Zui大壓降不得超過艙壓的設(shè)計(jì)參數(shù)。

Tips: (l)The flow above is standard air whose temperature is21°C

(70°F),pressure is 1013.25Pa, and density is 1.29kg/(m3).

(2) The maximum pressure drop shall not exceed the designparameter of cabin pressure valve.

2.6圖二是壓力閥的工作原理。

2.6 Figure 2 is the working principle of pressurevalve.

壓力真空閥的標(biāo)準(zhǔn)接頭與透氣管相聯(lián)，當(dāng)貨油艙裝載作業(yè)時(shí), 艙內(nèi)會(huì)形成壓縮氣體，當(dāng)壓縮氣體達(dá)到壓力閥開啟設(shè)定壓力時(shí)(一般油船為14.0 kPa,化學(xué)品船為18.0?20.0 kPa),帶重塊的壓力閥閥瓣就會(huì)自動(dòng)上升，并在一瞬間跳起和下落。艙內(nèi)壓縮氣體如箭頭所 示，從艙內(nèi)經(jīng)閥門到出口高速排向高空。同時(shí)閥內(nèi)壓力作用于真空閥瓣上，真空閥更加密封。

The standard joint of pressureA^acuum valve is connected withcargo tank, when the cargo tank is loading, the compressed air willformed, the pressure valve disc with block will automatically liftup, start and dropping in a flash while the compressed air meet tothe operating pressure (oil tanker is 14.0 kPa, chemical tanker is18.0?20.0 kPa) of pressure valve. The compressed air in the tank isas the arrowhead showed, it will relief to the air from cabin tothe exit through valve. At the same

圖二 Figure 2

2.7圖三是真空閥的工作原理。

2.7 Figure 3 is main principle of vacuum valve.

當(dāng)貨油艙卸貨作業(yè)時(shí)，艙內(nèi)就會(huì)形成真空(負(fù)壓)，當(dāng)負(fù)壓達(dá)到 真空閥設(shè)定開啟壓力時(shí)(一般為-3.5 kPa)閥門就會(huì)自動(dòng)打開,此時(shí)空氣如箭頭方向所示，從甲板空間經(jīng)防火網(wǎng)流入貨油艙內(nèi)。同時(shí)負(fù)壓 作用于P閥瓣上，壓力閥更加密封。

The vacuum (negative pressure) will formed when the tank unloading,and the valve will automatically open while the negative pressurereach to the opening pressure (?3.5kPa), at that time, the air willcome into the cabin from deck space through flame screen, which asthe arrowhead showed. The negative pressure will impact on thep-valve disc so that the sealing of pressure valve will bebetter.

壓力真空閥的安裝和使用

III. Installation and use of pressureA^acuum Vhlve

3.1每只壓力真空閥是以完全裝配好的整機(jī)形式供應(yīng)，均經(jīng)試 驗(yàn)校正合格，使壓力閥工作壓力、真空閥開啟壓力達(dá)到設(shè)計(jì)指標(biāo)不需再做任何調(diào)整。安裝工作只需把每個(gè)閥的法蘭用螺栓連接到相 應(yīng)的貨油艙透氣管匹配的法蘭上，即可完成。

3 .lEach valve will be provided as a whole, and each valve isadjusted and tested so that the working pressure of pressure valveand the opening pressure of vacuum valve reach to designedstandard. Workers only need to connect each flange of valve toventilating pipe of cargo tank by bolt before operate.

壓力真空閥的通道布置必須符合ISO15364A.3條要求，為了便于操作，應(yīng)布置適當(dāng)?shù)耐ǖ酪员?接近閥門進(jìn)行驗(yàn)證。例如需要時(shí)，可在甲板上設(shè) 置一個(gè)架子或平臺(tái)。

Passage for pressure/vacuum valve shall abide by there of ISO15364A.3. Please designaproper passage near thevalve for operating. For example, set

up a shelf or a platform on the deck if it is necessary.

? 壓力真空閥的安裝,應(yīng)該使用不銹鋼螺釘，即使 是油艙也應(yīng)該使用。

Use stainless steel bolt to install pressure/vacuum valve, eventhe oil tanker.

3.2通常情況下,為了便于操作，依據(jù)SOLAS公約第59條要求 安裝位置不得低于貨油艙甲板2m。壓力真空閥在液貨艙頂部的布置均為集中在上述架子或平臺(tái)上，每艙可分前后艙布置兩個(gè)平臺(tái)， 將所有壓力真空閥用管路與艙口蓋分別連接起來，集中到前后兩個(gè)平臺(tái)上，便于裝卸貨時(shí)操作、觀察，更便于拆裝和維護(hù)保養(yǎng)。由于集 中的平臺(tái)到各艙口蓋子的距離不等，就形成了其中肯定有一根Zui長(zhǎng)的管子，此管路是決定液貨艙Zui大壓降的關(guān)鍵因素。因此，必須依 據(jù)裝載率和貨品計(jì)算和合理布置，在保證管路內(nèi)徑不小于所選壓力真空閥通徑的情況下，管路的長(zhǎng)度應(yīng)由制造廠和設(shè)計(jì)院計(jì)算確定。

依據(jù)MSC/Circ.585《蒸氣排放控制系統(tǒng)標(biāo)準(zhǔn)》的規(guī)定，每只液貨 艙需設(shè)兩套透氣裝置或一套透氣裝置加一套液貨壓力傳感器。壓力傳感器的超壓報(bào)警壓力設(shè)定值在閥的設(shè)定壓力值與艙壓值之間。

3.2 Under normal circumstances, in order to facilitateoperation, accordance with the re of SOLAS conventionarticle 59, the installation position shall not below the cargo oiltank 2m. The arrangement of the pressure vacuum valve at the top ofa cargo tank are concentrated on the above shelf or platfomi, eachtank can decorate two platforms as front and back parts dividedly,and put all the pressure vacuum valve connected with the hatchcover respectively. Concentrating on two platform can facilitatethe operation and observing of loading and unloading cargo, whichis also convenient for dismantling and maintenance. Due to thedifferent length of concentrate platform to each hatch cover, theremust be a longest pipe. This pipe is the key factor of maximumpressure drop. Therefore, must calculate the reasonable layoutaccording to the loading rate and the cargo, under the condition ofpipe diameter should not less than the selected pressure vacuumvalve size, the length of the pipe shall be calculated anddetermined by the manufacturing plant and the design institute.

Based on MSC/Circ. 585 "the vapor emission control systemstandard "regulation, each cargo tank need two sets of breathabledevice or a device and a liquid pressure sensor and a set ofbreathable device.

The overpressure alarm pressure of the pressure sensors is setbetween the setting pressure of the valve and the tank pressurevalue.

3.3 DF-ISO-60型壓力真空閥安裝如圖四。

3.3The installation of the DF-ISO-60 pressure vacuum valve isshown in figure 4.

3.4壓力真空閥的使用：

裝貨作業(yè)時(shí):DF-ISO型壓力真空閥的壓力閥,處于運(yùn)作狀態(tài)。 因此，在裝貨開始前必須用轉(zhuǎn)動(dòng)(件11)頂升軸手柄順時(shí)針轉(zhuǎn)到上面位置,頂起閥組再轉(zhuǎn)回原位，閥組能自行落下,檢查閥組升降靈活。

卸貨作業(yè)時(shí):DF-ISO型高速透氣閥的真空閥,處于運(yùn)作狀態(tài)。 因此，在卸貨開始前必須將件(14)頂升桿向上頂起閥門，再放下，可反復(fù)多次,檢查閥門上升和下降靈活。

壓力閥和真空閥在裝卸作業(yè)時(shí)均為自動(dòng)工作，如在現(xiàn)場(chǎng)，可以 看到閥頭和閥桿的上升和下降，可以聽到出口氣體的流動(dòng)響聲。

3.4 use of pressure/vacuum Valve

Cargos loading: pressure valve of DF-ISO pressure/vacuum valveis under operation. Before loading oil, the handle must be shiftedto upper in clockwise direction through shift fitting 11, lift upthe valve kits and then shift back, the valve kits can fall down soas to check the flexibility of valve kits.

Cargos unloading: vacuum valve of DF-ISO pressure/vacuum val- veis under operation. Before unloading, the climbing pole shall liftup the valve and then drop by fitting 14, do it some times so as tocheck the flexibility of the valve.

Pressure valve and the vacuum valve are working automaticallywhen loading and unloading operation. If in the field, you can seethe rise and fall of the valve head and valve stem, outlet gas flowsound could be heard

壓力真空閥的維護(hù)保養(yǎng)

IVMaintenance of pressure/vacuum valve

按IMO規(guī)定,壓力真空閥至少應(yīng)采用下列的檢修間隔期:運(yùn)作 六個(gè)月后，閥組必須進(jìn)行檢查，以保證完全能起作用,必要時(shí)也應(yīng)加以清洗。運(yùn)作壹年后，閥組必須拆成零件加以清洗。必須按照國(guó)際 海事組織大會(huì)決議A.746C18)第6.2.3.3節(jié)船舶貨艙壓力真空閥的檢測(cè)要求進(jìn)行。

當(dāng)裝卸頻繁，液貨品種多變，應(yīng)根據(jù)具體情況及時(shí)進(jìn)行檢查和 清洗。

DF-ISO壓力真空閥的維護(hù)保養(yǎng)很方便、快捷,平常維護(hù)僅需在 平臺(tái)上進(jìn)行，每只閥門拆裝僅需幾分鐘，且不要將整閥卸下。

一般情況下,壓力閥的出口清洗只要將閥桿置于開啟位下即 可進(jìn)行，不需拆裝，真空閥需清洗的周期較長(zhǎng)，只要手動(dòng)檢查能符合3-4條要求，即可免于拆裝清理。

當(dāng)手動(dòng)檢查壓力真空閥開啟關(guān)閉有阻力,且有漏氣狀況發(fā)生時(shí)， 壓力真空閥應(yīng)按下列方法進(jìn)行拆裝、清洗。

In accordance with the stipulations of the IMO pressure/vacuumvalves shall comply with at least the following maintenanceintervals: after operation six months, the valve group must bechecked to ensure work regularly; it also should be cleaned ifnecessaiy. After operation one year, must split the group intoparts and clean them. Must operate according to the pressure vacuumvalve testing re for cargo hold in imo assemblyresolution A.746(18) Para.6.2.2.3.

When loading and unloading is frequent, liquid cargo varietydiverse should inspect and clean according to the specificconditions in a timely manner.

The maintenance of DF-ISO pressure /vacuum valve is veryconvenient and quick, common maintenance can operate on theplatform. The dismounting of each valve only takes a few minutes,and does not

need to remove the whole valve.

Under normal circumstances, the clean of the export of thepressure valve only need to put the stem under the open position,do not need to tear open the device. Vacuum valve need a longercleaning cycle, as long as the manual inspection meet there of article 3.4, there is no need of disassemblingcleaning.

When check pressure vacuum valve manually, there is resistancewhen open and close the valve, and there is a condition of leak,the pressure vacuum valve must be disassembled and cleanedaccording to the following method.

4.1壓力閥拆裝清洗程序：

4.1.1拆下件⑸頂端螺釘(內(nèi)六角螺絲)，即可提起件(5)P閥瓣。

4.1.2拆下件(3)的連接螺釘(內(nèi)六角螺絲)，即可向上提起件(3) P閥上體，進(jìn)行P閥上體孔內(nèi)清洗。

4.1.3提起件(6)、件⑺上的閥桿，即可進(jìn)行P閥體的全面清洗。 4丄4檢查清洗后，按照相反程序，將拆下的零件裝回原位。按3.4檢查，閥桿升降自如即可。

4.1 disassemble the pressure valve for cleaning:

4.1.1assemble the bolt (hex socket cap screw) on the top offitting 5, lift up fitting 5 P-valve disc.

4.1.2 assemble the connection bolt (hex socket cap screw)of fitting (3), lift up fitting (3) P-valve body, clean the hole ofit.

4.1.3 lift up valve pole on the fitting (6) and fitting(7), clean the P- valve body.

4.1.4 assemble the fittings in opposite after checking andcleaning. Check it follow words, which mentioned in the 4.1;

4.2真空閥的拆卸、清洗程序

42.1拆下件(22) V閥蓋上的吊環(huán)螺絲或緊固螺釘，即可向上提 起閥蓋。

4.2.2提起件(16),即可將件(16)V閥閥瓣從閥體中取出進(jìn)行清理,同時(shí)對(duì)閥腔內(nèi)，特別是閥口密封面進(jìn)行檢查和清洗。此時(shí)清洗后 也應(yīng)嚴(yán)格檢查件(16)和件(17)結(jié)合面是否損壞和有無缺陷。

4.2.3 一般情況下，防火網(wǎng)上如有灰塵，只要從上面清洗即可。如需拆開清洗，只要拆下件(21)連接螺釘，即可將防火網(wǎng)整體取下，進(jìn) 行清洗。

4.2.4檢查清洗后,按照相反程序，將拆下的零件裝回原位，按4.2條方法檢查，閥桿升降自如即可。也可先檢查，后裝入件(22)V閥蓋。

4.2 disassembling and cleaning procedures of vacuumvalve

4.2.1 disassemble the wing screw or fastened bolt onfitting valve cover, lift up (22)V-valve cover;

4.2.2 lift fitting (16), take the fitting (16) V-valve discout of valve body for cleaning. At the same time, clean and repairthe interior of valve, especially the sealing space of valve. Italso should check whether there is any damages or flaws on theconnection space between fitting (16) and fitting (17).

4.2.3 general speaking, clean the dust on the flame screenfrom exterior. It only needs to disassemble fitting (21) connectionscrew for taking the flame screen out, then clean it;

4.2.4 assemble the fittings in opposite after checking andcleaning. Check it as the words mentioned in the 3.4; check itfirst and then fix fitting (22) valve cover is also ok.

① 清洗時(shí)，件(6)、件(7)是一個(gè)組合件，不得松開面的

注意事項(xiàng) 定位螺絲，更不能拆開。

Attention Fitting (6) and fitting (7) is a combination parts, dono t loose or disassemble the set screw when cleaning;所有拆卸的零部件都不得在過程中有碰撞現(xiàn)象發(fā) 生，否則拆裝后，閥體就不能正常工作。

All disassembled fittings shall keep separately, the valve bodycannot operate smoothly if there is any damages;

?閥體零部件在拆卸時(shí)，都應(yīng)置放合理，應(yīng)放置在軟墊上進(jìn)彳亍。拆卸清洗嚴(yán)格按程序進(jìn)彳亍。

The disassembled fittings shall put on the soft mat reasonably,and disassembled follow the procedure strictly;

?清洗時(shí)應(yīng)用帶清潔劑的紗布進(jìn)行,應(yīng)將清洗物盡 量清出閥體，而不致流入艙內(nèi)。

Use gauze with detergent for cleaning, and clear the dirt awayfrom valve body;

?檢查清洗的閥門如不能正常工作，升降不自如， 必須由制造廠進(jìn)行修理。

Check the valve; it must be sent to the manufacturer forrepairing if it cannot performance smoothly;

?真空閥和壓力閥組件，其開啟壓力出廠時(shí)已經(jīng)嚴(yán) 格調(diào)整和檢查，用戶如需調(diào)整開啟壓力，也必須送 制造廠進(jìn)行。

The manufacturer adjusted and tested the opening pressure of thevacuum valve and kits of pressure valve strictly, it must be sentto the manufacturer for adjusting the opening pressure if it isnecessary.

五'驅(qū)氣蓋的使用和維護(hù)

V- Usage and Maintains of Gas-Freeing Cover

5.1驅(qū)氣蓋的主要用途

5. IMain purposes of gas freeing cover

當(dāng)貨油艙的透氣系統(tǒng)裝設(shè)了符合規(guī)定的高速透氣閥以后，艙內(nèi) 的驅(qū)氣，只要達(dá)到高速透氣閥的設(shè)定開啟壓力,壓力閥門就可以自動(dòng)開啟，以30m/s的速度向甲板上空排出。但貨油艙的其他作業(yè)工況， 比如清倉、除氣，也需透氣，此時(shí)艙內(nèi)壓力又不能自動(dòng)開啟高速透氣閥，貨油艙的透氣就需要配備一個(gè)能手動(dòng)開啟的裝置，此透氣裝置 即為驅(qū)氣蓋。驅(qū)氣蓋可以安裝在高速透氣閥的V閥體上，也可獨(dú)立安裝在高速透氣閥的分支管上。

The valve will automatically open and eject to the upper of deckwith the speed of 30m/s while the freeing gas in the tank reach tothe opening pressure of high velocity relief valve. The innerpressure of the tank cannot automatically open the high velocityrelief valve while cleaning, exhausting. It need a manual devicefor its ventilating, such ventilating device is a gas freeingcover. It can be installed in the V-valve body of high velocityrelief valve (see Picture 2), or be installed separately in thebranch pipe of high velocity relief valve.

在通常情況下，驅(qū)氣蓋打開時(shí)，其透出氣體一般不會(huì)是可燃?xì)?體，由于工作壓力較低(不大于2.0kPa時(shí))，其出口流速不超過20m/So因此，船舶航行和裝卸作業(yè)時(shí)，驅(qū)氣蓋只能是關(guān)閉狀態(tài)。

Generally, the gas exhausted from gas freeing cover isincombustible. The gas freeing cover shall be closed when the shipnavigating or loading for the working pressure is too low (lessthan 2.0 kPa) and the flow rate is less than 20m/s.

該驅(qū)氣蓋作為管端暴燃阻火器，已依據(jù)MSC/ciK.677中的有關(guān) 要求，進(jìn)行了全部試驗(yàn)。

As a fire arrester to prevent the pipe end from deflagrating,the gas freeing cover has been tested according to the regulationsof MSC/circ. 667.

5.2驅(qū)氣蓋的主要結(jié)構(gòu)

驅(qū)氣蓋安裝在真空閥上，由螺釘連接真空閥體。驅(qū)氣蓋由防火 網(wǎng)、殼體和上蓋組成(見圖五)5.2 Main structure ofgas freeing covhe gas freeing cover is installed in the vacuumvalve by blt, it is

圖五 Figure 5

composed of flame screen, shell and upper cover. (See Figure5).

5-3驅(qū)氣蓋的使用方法和維護(hù)保養(yǎng)

驅(qū)氣蓋使用時(shí)，只要松開吊環(huán)螺母甲，拆下乙，即可旋轉(zhuǎn)上蓋至 開啟位置，后鎖緊甲，使用完后必須恢復(fù)原狀。

驅(qū)氣蓋的吊環(huán)螺母、上蓋及防火網(wǎng)使用優(yōu)質(zhì)不銹鋼材料制造， 使用中應(yīng)經(jīng)常保持清潔，應(yīng)定期進(jìn)行常規(guī)清洗。

當(dāng)真空閥內(nèi)應(yīng)進(jìn)行清理時(shí)，只要拆開其與真空閥的連接螺釘， 即可移動(dòng)驅(qū)氣蓋,進(jìn)行真空閥內(nèi)清理。

5.3 Usage and maintenance of gas freeing cover

Ventilate the tank: loose the A-ring screw, remove theB-ring

screw,rotate top cover to open position, then lock the A-ringscrew,must be restored after use;

The ring screw, cover and flame screen is made of high steel, keep its cleanness during operation, and clean itregularly.

Clean the interior of vacuum valve: disassemble the connectionbolt and move the gas freeing cover, then do the cleaning.

帶加熱裝置的高速透氣閥

VI. High velocity relief valve with heating device

依據(jù)ISO15364的要求，船舶在裝載某些可能因蒸氣冷凝而產(chǎn) 生的結(jié)晶貨物時(shí)，需配備加熱裝置。

本加熱裝置結(jié)構(gòu)簡(jiǎn)單，加熱直接、迅速，可用于1.2MPa以下的 熱蒸氣和熱液體進(jìn)行循環(huán)加熱。

加熱裝置的結(jié)構(gòu)見圖六。

According to the re of ISO 15364, heating device shallbe installed when loading the cargos which will be crystallized bysteam condensation.

The structure of this heating device is very simple, which canheat directly and It also can cycle heat for hot steam andhot liquid under 1.2Mpa.

Please to see figure 6 for Structure of Heating Device

6.1加熱裝置的使用方法。

每只供貨狀態(tài)的加熱裝置如圖六所示,只要將V閥氣液出口和 P閥氣液進(jìn)口相聯(lián),即可將P、V閥加熱裝置串聯(lián)在一起。

6.1.1如只要進(jìn)行每臺(tái)閥門的獨(dú)立加熱，直接將氣液接入V閥 進(jìn)口，P閥氣液出口接回路即可。

6.1.2如果需要將所有閥門加熱串聯(lián)在一起使用，直接將每只 閥門的P閥氣液出口和V閥氣液進(jìn)口串聯(lián)在一起即可，如圖六所示。

6.1Usage of Heating Device

The heating device is as figure 6, heating devices of P-valveand V-valve can be series connected by connecting air-li of P- valve and V-valve.

6.1.1 Input theuid to V-valve anduid outlet of P-valve with circuit for heating valveindependently;

6.1.2Connectuid outlets of P-valve and V-valve inserious for heating all valves in series, lb see picture 6 .

6.2加熱裝置的維護(hù)保養(yǎng)加熱囊采用優(yōu)質(zhì)不銹鋼制造，應(yīng)防止有較強(qiáng)腐蝕 性的溶液進(jìn)入，如硝酸和氫氟酸等。heating bag ismade by high stainless steel to prevent strong corrosivesolution from it, such as Ni

trie acid and hydrofluoric acid, etc.

加熱裝置在使用過程中，只要不發(fā)生跑、冒、漏現(xiàn)象，即無需進(jìn) 行任何維護(hù)保養(yǎng)。如發(fā)現(xiàn)滲漏，必須停止使用,并送制造廠進(jìn)行修理。

Maintenance is unnecessary, if there is no running, emitting andleakage happened during using of heating device. Heating devicecannot be used and shall be maintained by manufacturer if theleakage happened.

易損件及易損件的更換

VQ. Wearing Parts and Replacement of the Wearing Parts

閥門內(nèi)僅有的易損件為。型密封圈(規(guī)格為①10.6x2.65),材料為氟橡膠，每臺(tái)一件,用于件(11)頂升手柄的軸上。更換時(shí),只要拆 下件(11)手柄上的肖子和軸蓋上的連接螺釘，即可取下手柄和軸蓋。此時(shí)只要向外拔出頂升軸，即可更換密封圈(見圖七)。

The only wearing parts of valve is O-type seal ring (size:① 10.6*2.65), which made by fluorine rubber. Only one O-typeseal ring on axle of parts (11) lifting handle for each valve. Whenreplacement, dissemble the bolt of the parts (11) handle andconnecting bolt on axle cover, then dissemble handle and axlecover. Lifting axle only need to pull to replace the seal ring (tosee 

八'其它事項(xiàng)

W.Other Items

8.1每只閥門均以完整的包裝提供給用戶。用戶開箱時(shí)，必須 按裝箱單查收所有隨機(jī)文件資料和配件。

8.2DF-ISO型壓力真空閥結(jié)構(gòu)簡(jiǎn)單，其制造精度具有較好的定 位，在船東進(jìn)行拆裝清洗中,是不會(huì)改變其性能的。在使用過程中，除了因附著物影響閥門開啟和關(guān)閉外，不會(huì)發(fā)生其它故障。如有， 在包用期內(nèi)則由制造商換新。換新后的包用期自更換之日起開始。

8.1 Every valve is well packaged. Please check thedocuments attached to the box and fittings.

8.2 The structure ofDF-ISO pressureA^acuumvalve is simple.The characteristics will not be changed while it is dissembled andcleaned because of the good positionue of manufacturingprecision. The accident will not happen except something cling tothe valve during the operating process. Manufacturer will re-new itif it is in trouble within the guarantee period. The guaranteeperiod of the new one is starting from the day re-newed.