1. Pressure Gauge: bourdon tube(general purpose),weather-proof, liquid filled, low-pressure, diaphragm-seal, with electric/micro contact,test pressure gauge,digital pressure gauge,diaphragm pressure, ss gauge,pressure switch. 2. ... 。Specializes in manufacture of tire pressure gauges, precision pressure gauges, equipment & instruments, test equipment for auto and more in over10 categories and several 10 varieties.
Tire Pressure Gauge. Our company specializes in manufacture of tire pressure gauges, precision pressure gauges, equipment & instruments, test equipment for auto and more in over10 categories and several 10 varieties. ... 2004 Copyright chinaleierda pressure gauge 
All our tire pressure gauges are for export purpose selling to more than 20 foreign countries, winning an unanimous trust from the users in the United States, Japan and Europe, who have offered us a status of their designated manufacturer of such gauges under their brand name. Presently we yearly produce more than 3 million different pressure gauges and more than 10 million pen-type pressure gauges and is listed among the key export commodity manufacturers at the municipal level. Since 1986 our company has been confirmed as a contract-respectful and high credit enterprise. 

Our company was founded in 1986. With full assistance and concern of friends from different walks it has grown into a medium-sized modern enterprise with a built space of 3000m',more than 10 million yuan-worthy fixed assets and more than 200 employees (including more than 20 technical experts). This is a result of over 10 years of our struggles. 
　　Our company specializes in manufacture of precision pressure gauges, tire pressure gauges, equipment & instruments, test equipment for auto and more in over10 categories and several 10 varieties. All our products are for export purpose selling to more than 20 foreign countries, winning an unanimous trust from the users in the United States, Japan and Europe, who have offered us a status of their designated manufacturer of such gauges under their brand name. Presently we yearly produce more than 3 million different pressure gauges and more than 10 million pen-type pressure gauges and is listed among the key export commodity manufacturers at the municipal level. Since 1986 our company has been confirmed as a contract-respectful and high credit enterprise. 
　　Our company will adhere to the principle of "being piloted by the market, living on quality. Making progress on development. Benefiting from management", never stops exploration and seeks advancing with friends from home and abroad hand in hand to achieve a still greater growth in the new century based on our novel design and high quality of products and good enterprise credit.
　　Our company can according customers' requests to produce. We have get the certificate of ISO 9001. 
Tire Pressure Gauge - Cixi Haihong Industry Co.,Ltd. - Tire Pressure Gauge. Our company specializes in manufacture of tire pressure gauges, precision pressure gauges, equipment & instruments, test equipment for auto and more in over10 categories and several 10 varieties. ... 2003 Copyright Cixi Haihong ... 
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Pressure Gauges from GlobalSpec - ... A broad spectrum of pressure gauges are available from pressure gauge manufacturers, including fuel pressure gauges, digital fuel pressure gauges, oil pressure gauges, water pressure gauges, air pressure gauges, digital air pressure gauges, ... 
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pressure gauge,thermometer.cylinder,presssure transmitters/EC51 ... - ... OEM basis. 1. Pressure Gauge: bourdon tube(general purpose),weather-proof, liquid filled, low-pressure, diaphragm-seal, with electric/micro contact,test pressure gauge,digital pressure gauge,diaphragm pressure, ss gauge,pressure switch. 2. ... 
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Pressure Gauges & Switches - Pressure Gauge Designs Two common reasons for gauge (and switch) failure are pipe vibration and water condensation, which in colder climates can freeze and damage the gauge housing. Figure 5-1 illustrates the design of both a traditional and ... 
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关键词:pressure gauge,Cole-Parmer: digital pressure gauges - ... See Entire Line... Digital Pressure Gauge Quick Link. ... Digital Pressure Gauge Center The 2005/2006 Cole-Parmer General Catalog- features 20 new product sections and over 10,000 new products. Request your FREE copy of the catalog that has become ... 
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Amazon.com: Tools & Hardware: Measurement Specialties MS-400046 ... - ... Start by adding five items to your Wish List. Learn more. Measurement Specialties MS-400046 Digital Tire Pressure Gauge with Free Keychain Tire Gauge ... Accessories for Measurement Specialties MS-400046 Digital Tire Pressure Gauge with Free Keychain ... 
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Introduction of our company
Cixi Ningfeng Pressure Gauge Factory invested by K. M GAUGE CO., LTD which was established in 1998, is specialized in producing accurate utility gauges. In the past years, Ningfeng has kept importing advanced equipment and technology, recruiting experts, and learning administration from foreign countries. All these efforts have made Ningfeng a leading company and exporting-base in China. Now she has a stuff of 200, among which there are 30 technicians. With all the advanced equipments and experts, she can provide the world wide customers with moue than 3000000 gauge annually. Ningfeng has got the certification of ISO9000 and UL.
Our main products are Microbarometer series ；Electric contact gauge series ；Shock-proof electric contact gauge series；Stainless steel pressure gauge series； Dry and glycerin filled pressure gauge series ；Freon pressure gauge series； Oxygen-acetylene pressure gauge series ；Stainless steel vacuum pressure gauges series； Diaphragm seal pressure gauge series； Electric contact diaphragm seal pressure gauge series ；Shock-proof electric contact diaphragm seal pressure gauge series ；Minitype pressure gauge series(1inch) ; Accurate pressure gauge series .all the products can meet both national and international stands, such as China GB1226-86 and US ASME B40.1 standard. 
Quality is the key factor to the success of an enterprise. Well awaring of this, Ningfeng takes strict control on every aspect of the procedure, from raw material purchasing, designing, assembly, testing, and packing. So every product from Ningfeng is a kind of satisfaction to the customer.
Ningfeng’S efforts have been accepted by more and more customers. Now she has customers all over the world, such as US, Canada, Japan, TaiWan, Europe, HK, etc.
We have made some achievement already, but that is not enough. In the coming days we will continue strengthening our modern management as well as emphasizing technology-innovate, so as to broaden both domestic and foreign markets. Ningfeng sincerely hopes to serve you in the coming day.
公 司 简 介
宁丰实业有限公司是是一家专业压力仪表制造商，主要设备从国外进口，性能优越，自动化程度高，且引进国外压力表的先进技术，工艺规格和严格的管理机制，生产能力可达到世界先进水平。现在公司已获得ISO9000质量体系认证及UL认证。
公司经营的产品主要有：微压表；电接点压力表；耐振电接点压力表；全不锈钢压力表；一般或耐振压力表；冷媒压力表；氧气乙炔压力表，全不锈钢真空压力表和隔膜压力表，电接点隔膜压力表，耐振电接点隔膜压力表；超微型压力表(1英寸)；精密压力表。按照美国ASME B40.1标准和中国GB1226-86标准生产各种规格型号的压力表及英，美制锥管，直管螺纹或公制螺纹接口，广泛适应进口及国产设备配套和研制新产品对压力表的要求。
我们明确意识到:“质量是企业的命脉”。本着这一条原则， 宁丰严格控制从产品设计, 原材料采购、生产、测试、包装到出货的每个环节，以确保交到客户手中都是让顾客信得过的产品。
为了确保产品的高品质和高精确性，宁丰不断的引进高科技人才和先进设备。我们的努力已经被越来越多的国内外的客户所认可。这些客户遍布美国、加拿大、日本、台湾、欧洲、香港及其他国家和地区。
在过去已经取得的辉煌成绩基础上，宁丰将进一步加强管理，不断地进行科学创新，从多方面满足客户，从而增加国内外市场份额。
在此，宁丰衷心地希望能在不久的将来能与各界友好人士成为亲密的合作伙伴！
常用压力单位换算表　
Kgf/cm2 Mpa Bar KPa mBar psi mmH2O Torr atm Pa(N/M2) 微巴
μbar inHg 
千克力/厘米2 ib/in2 mmAq mmHg 帕斯卡 
工程大气压 兆帕 巴 千帕 毫巴 磅/英寸2 毫米水柱 毫米汞柱 标准大气压 牛顿/米2 巴利 英寸汞柱
压力表用途简述

产品名称 用途简述 
一般压力表 量测静压，对铜和铜合金无腐蚀性,无爆炸性,无结晶,不沉淀的气体或液体的压力.如水空气等。 
不锈钢压力表 不锈钢压力表广泛用于石油、化工、化纤、冶金、电站等工业部门中对耐腐、抗振有要求较高的工艺流程中测量各种流体介质的压力，温度在85 ℃以下的气液体介质的压力，适用于腐蚀性较强的适合不锈钢元件检测的介质和恶劣的外部腐蚀环境中。可代用一般压力表。 
微差压表 主要应用于量测Pa级的压力，显示洁净室和层流罩的低压或负压或空调室的风压等. 
膜盒压力表(微压表) 主要应用于量测KPa级压力，测量对铜不腐蚀的微压和负压,适用于瓦斯燃烧设备、涂装设备和燃气加热系统、煤气管道工程如锅炉通风,气体管道燃烧设备,现场指示0.5Kg/cm2以下之微弱气液体压力.如调压箱、燃烧器、锅炉、烤炉、烘箱、厨具等工业设备用气测量显示仪表。 
耐震压力表 用于测量对铜和铜合金无腐蚀性、无爆炸性、且不结晶、不沉淀的气体或液体的压力。该产品最大的特点是能在剧烈震动的机床或设备中能够正常测压。抗震等级为V.H.4和V.H.5适用量测激烈震动之场所介质压力脉冲频繁，长时间处于工作状态的机械和设备压力，可代用一般压力表。 
一般电接点压力表 适用于测量对铜和铜合金无腐蚀作用气体和液体的压力和真空，同时可直接用于压力控制，或控制发讯，测量无结晶,不沉淀，无爆炸危险的流体介质的压力，且需对被测（控）压力系统实现自动控制和发信（报警）的目的的。 
不锈钢电接点表 测量无爆炸危险，有一定腐蚀性、非凝固或非结晶的各种流体介质的压力且需对被测（控）压力系统实现自动控制和发信（报警）的目的的。可代用一般电接点压力表. 
不锈钢耐震隔膜电接点表 测量无爆炸危险，介质压力脉冲频繁，长时间处于工作状态，有一定腐蚀性、凝固或结晶的各种流体介质的压力且需对被测（控）压力系统实现自动控制和发信（报警）的目的的. 
隔膜压力表 为使通用型压力表能适应于测量强腐蚀、高温、高粘度、易结晶、易凝固、有固体浮动物的介质压力以及必须避免测量介质直接进入通用型压力表和防止沉淀物积聚且易清洗的场合，应必须采用隔离器与通用型 压力仪表组成一个系统的隔膜表。 
精密压力表 主要用来校验工业用普通压力表也可用于精密测量对铜合金和合金结构钢等无腐蚀性、非结晶、非凝固的各种介质的压力。在标度线下设有镜面环，使仪表读数更清晰精确，外形美观新颖。精确度为0.4、0.25级。 
不锈钢耐震压力表 适用于腐蚀性较强的适合不锈钢元件检测的介质和恶劣的外部腐蚀环境中，同时滿足激烈震动之场所，介质压力脉冲频繁的工作环境中。可代用不锈钢压力表和耐震压力表。 
耐酸、耐腐压力表 本仪表广泛用于石油、化工、化纤、冶金、电站等工业部门中对耐腐、抗振有要求较高的工艺流程中测量和各种流体介质的压力。 
冷媒压力表 适用于介质温度较低或特殊介质，如冷媒（氟利氨）或氨，应用于，空调，冷柜，或冷水机 
不锈钢真空压力表 量测无腐蚀性或微蚀性,无爆炸性,无结晶,不沉淀的气体或液体的负压，或正压和负压。 
微型压力表 适用被测量物的安装空间狭小，或有特殊尺寸要求的 
耐高温不锈钢隔膜压力表 由不锈钢隔膜压力表加散热器或冷凝管构成，必要时还要装二级或三级散热装置，测量有一定腐蚀性、凝固或结晶的各种流体介质的压力的高温场所，如过饱和蒸汽，温度在120 ℃以上的气液体介质的压力。 
Ningfeng INDUSTRIAL CO., LTD.
SPECIALIZED IN PRESSURE GAUGE
工业压力表的选用、安装及使用注意事项
一、压力（差压）检测仪表的正确选用

　　压力检测仪表的正确选用主要包括确定仪表的型式、量程、范围、准确度和灵敏度、外形尺寸以及是否需要远传和具有其它功能，如指示、记录、调节、报警等。 
　　选用的主要依据： 
　　1．工艺生产过程对测量的要求，包括量程和准确度。在静态测试（或变化缓慢）的情况下，规定被测压力的最大值选用压力表满刻度值的三分之二；在脉动（波动）压力的情况下，被测压力的最大值选用压力表满刻度值的二分之一。 
　　常用压力检测仪表的准确度等级有0．4级、1．0级、1．5级和2．5级4个级等，应从生产工艺准确度要求和最经济角度选用。仪表的最大允许误差是仪表的量程与准确度等级百分比的乘积，如果误差值超过工艺要求准确度，则需更换准确度高一级的压力仪表。
　　2．被测介质的性质，如状态（气体、液体）、温度、粘度、腐蚀性、法污程度、易燃和易爆程度等。如氧气表、乙炔表，带有“禁油”标志，专用于特殊介质的耐腐蚀压力表、耐高温压力表、隔膜压力表等。

　　3．现场的环境条件，如环境温度、腐蚀情况、振动、潮湿程度等。如用于振动环境条件的防震压力表。
　　4．适于工作人员的观测。根据检测仪表所处位置和照明情况选用表径（外形尺寸）不等的仪表。 

二、压力（差压）检测仪表的检定和校准
　　仪表在使用之前，必须检定和校准。长期使用的仪表也应定期检定，其周期应视使用频繁程度和重点程度而定。当仪表带有远距离传送系统及二次仪表时，应连同二次仪表一起检定、校准。

三、压力（差压）检测仪表的正确安装及有关事项 
　　进行压力检测，实际上需要一个测量系统来实现。要做到准确测量，除对仪表进行正确选择和检定（校准）外，还必须注意整个系统的正确安装。如果只是仪表本身准确，其示值并不能完全代表被测介质的实际参数，因为测量系统的误差并不等于仪表的误差。
　　系统的正确安装包括取压口的开口位置、连接导管的合理铺设和仪表安装位置的正确等。
　　1．取压口的位置选择（1）避免处于管路弯曲、分叉及流束形成涡流的区域。（2）当管路中有突出物体（如测温组件）时，取压口应取在其前面。（3）当必须在调节阀门附近取压 时，若取压口在其前，则与阀门距离应 不小于2倍管径；若取压口在其后，则 与阀门距离应不小于3倍管径。（4）对 于宽广容器，取压口应处于流体流动平稳和无涡流的区域。总之，在工艺流程上确定的取压口位置应能保证测得所要选取的工艺参数。
　　2．连接导管的铺设 
　　连接导管的水平段应有一定的斜度，以利于排除冷凝液体或气体。当被测介质为气体时，导管应向取压口方向低倾；当被测介质为液体时，导管则应向测压仪表方向倾斜；当被测参数为较小的差压值时，倾斜度可再稍大一点。此外，如导管在上下拐弯处，则应根据导管中的介质情况，在最低点安置排泄冷凝液体装置或在最高处安置排气装置，以保证在相当长的时间内不致因在导管中积 存冷凝液体或气体而影响测量的准确度。冷凝液体或气体要定期排放。
　　3．测压仪表的安装及使用注意事项　　（1）仪表应垂直于水平面安装；（2）仪表测定点与仪表安装处在同一水平位置，否考虑附加高度误差的修正；（3）仪表安装处与测定点之间的距离应尽量短，以免指示迟缓；（4）保证密封性，不应有泄漏现象出现，尤其是易燃易爆气体介质和有毒有害介质。

　　仪表在下列情况使用时应加附加装置，但不应产生附加误差，否则应考虑修正。（1）为了保证仪表不受被测介质侵蚀或粘度太大、结晶的影响，应加装隔离装 置；（2）为了保证仪表不受被测介质的急剧变化或脉动压力的影响，加装缓冲器。尤其在压力剧增和压力陡降，最容易使压力仪表损坏报废，甚至弹簧管崩裂，发生泄漏现象；（3）为了保证仪表不受振动的影响，压力仪表应加装减振装置及固定装置；（4）为了保证仪表不受被测介质高温的影响，应加装充满液体的弯管装置；（5）专用的特殊仪表，严禁他用，也严禁在没有特殊可靠的装置上进行测量，更严禁用一般的压力表作特殊介质的压力测量；（6）对于新购置的压力检测仪表，在安装使用之前，一定要进行计量检定，以防压力仪表运输途中震动、损坏或其它因素破坏准确度。
Pressure Gauge Installation, Operation & Maintenance
Selecting a Pressure Gauge &Pressure Range &Installation &Operation & Maintenance of Pressure Gauge 
Selecting a Pressure Gauge it is important to consider the various information outlined in this manual to ensure appropriate pressure gauge selection and usage. Improper application can lead to instrument failure and possible personal injury and/or property damage. The following information in this manual is meant to be a guide in the selection process. Please feel free to consult Ningfeng Instruments for further assistance and clarification. 
Types of Pressure Gauges Ningfeng offer a full range of pressure gauges suitable for virtually all types of applications. Some specific types of pressure gauges that will be covered in this manual are general-purpose Bourdon tube, capsule-type, duplex, and differential pressure gauges. 
General-Purpose Bourdon Tube Gauge his common type of gauge utilizes a C-Bourdon tube, which usually has an arc of 250 degrees. The process pressure is connected to the fixed socket end of the tube, while the tip end is sealed. Because of the difference between inside and outside radii, the Bourdon tube tends to straighten when pressure is applied. The non-linear motion at the tip of the Bourdon tube is converted to linear rotational pointer response through the use of gears and pinion movement. This type of pressure gauge is used in medium to high-pressure measurements with accuracies of 0.1 to 3% of full span. The pressure range capabilities starts from 15 psi (100 kPa) to 20,000 psi (137.8 Mpa).
Pressure Range Select a pressure gauge with a full-scale pressure range of approximately twice the normal operating pressure. For Bourdon tube gauges, the maximum operating pressure should not exceed 75% of the full-scale range. The exception to this rule is the opposing Bourdon tube differential gauge. Failure to select a gauge within these criteria may result in premature fatigue and failure of the Bourdon tube. 
Temperatures The normal ambient temperature ranges are -40C to 70C (-40F to 158F) for dry gauges and -25C to 65C (-13F to 149F) for glycerin filled gauges. The process temperature for dry gauges can be up to 400C (752F). In situations where the process temperature is extreme, utilizing a syphon or remote mounting the pressure gauge with a capillary and diaphragm seal are reasonable alternatives. In general, a gauge is unduly hot if it cannot be grasped by hand without discomfort. It should be noted that gauges used on water might burst if exposed to frost. Please consult Ningfeng for your specific requirements. 
Materials inters provide a full range of casing and wetted parts to accommodate all types of applications. The most common wetted parts used are brass and 316 stainless steel. Brass wetted parts are suitable for use on the following types of media; air; oil, water and other non-corrosive fluids. For corrosive fluids, stainless steel should be specified. For special applications, other materials such as Monel can be used as well. Diaphragm seals may also be considered. Please consult Ningfeng Instruments for assistance. 
Vibrations Vibrations and extreme ambient temperatures can affect the dial reading of the pressure gauges. These areas should be avoided as much as possible. Vibration effects can be minimized by the use of a dampening liquid such as glycerin or silicone. If vibration is extreme, then a flexible tube connected to an appropriate diaphragm seal should be considered.
Pulsations If pressures are expected to pulsate violently, oscillate with high frequency or occur with sudden shock, a snubber should be considered. Ningfeng snubbers incorporate sintered porous 316 stainless steel snubbing element with a large surface area to ensure long term effectiveness on most pressure media. Snubbers are available in the three viscosity classifications; heavy oil, water and air. Brass, stainless steel or Monel housing can be specified depending upon the media used. 
Isolating Valves It is recommended that isolating valves be fitted with the gauge. This enables the gauge to be removed at any time for checking, recalibration or replacing without interruption to the process. The valves should be opened or closed slowly to avoid sudden changes to pressure being applied to the gauge. It is recommended for systems that have an abrupt pressure surge at start-up to close the valves during initial start-up. 
Installation 
Location Vibrations and extreme ambient temperatures can affect the dial reading of the pressure gauge. These areas should be avoided as much as possible. Vibration effects can be minimized by the use of a dampening liquid such as glycerin or silicone. If vibration is extreme, then a diaphragm seal connection should be considered. 
Mounting A suitable thread sealant is required for N.P.T. threads such as pipe .dope or Teflon tape. Never use any part of the pressure gauge other than .the wrench flats that is on the gauge socket. Always tighten with an open .end or adjustable wrench on the wrench flats. Failure to do so will severely .damage the pressure gauge. Please note the following special requirements 
Operation & Maintenance of Pressure Gauge
Storage All pressure gauges should be placed in dry storage under ambient room temperatures. It is recommended to store the pressure gauges in their original packing boxes. 
Inspection Frequency W inters pressure gauges are rugged instruments featuring simplicity of design to provide dependable and efficient service. The frequency of inspection is dependent on the severity of service and how critical the accuracy of the indicating pressure is. The inspection frequency can range from monthly to annually basis.

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CIXI NINGFENG PRESSURE GAUGE FACTRORY

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