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Murphy A20T / A25T Mechanical Temperature Gauges直感式温度表
Murphy A20 Series Temperature Swichgages

A20系列(2英寸/ 51毫米刻度盘)和A25系列(2-1 / 2英寸/ 64毫米刻度盘)是隔膜驱动的温度指示量具,带有用于跳闸警报和/的内置电气开关。或关闭设备。范围从32°-120°F(0°-45°C)到300°-440°F(160°-220°C)。

Swichgage 工具是建立在美国和保护了发动机和设备的应用,如石油和天然气,船舶,水利,建筑和货运应用程序监控发动机冷却液,曲轴箱油,变速箱油和其他超过80年。

摩菲Murphy的A20和A25等系列直感式温度表采用继电式仪表设计,其设计先进技术一流,拥有60多年的设计与制造经验。它属于摩菲Swichagae继电式仪表系列,在显示温度参数的同时,还提供控制功能,内置单刀双掷开关,在温度过高或过高过低的时候输出报警信号或常闭常开信号,保护用户设备安全运行。 MURPHY A20系列(2英寸/51mm刻度盘)和A25系列(2-1/2英寸/64mm刻度盘)开关量表型号为隔膜驱动、温度指示仪表、内置电气开关,用于跳闸报警和/或停机装置。

 

A20T / A25T Series Temperature Swichgage | Murphy by Enovation Controls
A20 and A25 Series - FW Murphy Production Controls

 

  • 表盘 :黑底白字; 美国标准刻度是°F /°C双刻度; 其他可用
  • 外壳 :玻璃填充/聚碳酸酯,耐腐蚀; 随附钢制安装夹
  • 挡板 :抛光不锈钢,标准; 其他可用。
  • 指针 :回火的镍银; 红色提示
  • 镜片 :聚碳酸酯,高强度
  • 感应元件 :铍铜膜片
  • 毛细管 :聚氯乙烯铠装铜; 1.2毫米(4英尺)。*可选的不锈钢装甲
  • 感应灯泡 :铜*
  • 量具精度 :请参阅技术公告中的精度表
  • 高温度 :请参阅技术公告中的温度范围和出厂设置表
  • 高环境温度: -40°F(-40°C)至150°F(66°C)可调极限触点(A20T和A25T):SPST触点; 仅限飞行员,2 A @ 30 VAC / VDC; 与外壳接地隔离当达到上限时关闭。 当指针在正常操作范围内时,常开。 触点是闪金的银。
  • 限位触点调整: 用1/16英寸六角扳手穿过刻度尺的100%。
    • 接线 :A20T-4号螺钉端子; A25T-6号螺丝端子。
  • 快动开关额定值(A20TE和A25TE) :SPDT,3 A @ 30 VDC感性; 4 A @ 125 VAC感性
    • 接线 :A20TE-4号螺钉端子; A25TE-6号螺丝端子
  • 单位重量 :
    • A20系列:11.9盎司。 (0.370公斤)
    • A25系列型号:13.3盎司。 (0.413公斤)
  • 单位尺寸:
    • A20系列:4-3 / 4 x 4-3 / 4 x 3英寸(121 x 121 x 76毫米)
    • A25系列型号:4-3 / 4 x 4-3 / 4 x 2-3 / 4英寸(121 x 121 x 70毫米)

*有关可选的毛细管长度,发动机适配器,感应灯泡和范围组合,请参阅Murphy公告8428。

 

 

这些坚固耐用的仪器的所有型号都通过聚碳酸酯表壳和镜头,抛光不锈钢表圈和O形圈密封件的独特结合而完全与环境隔离。 这些由蒸汽/压力驱动的压力计具有密封的毛细管和传感灯泡。 当受热时,传感灯泡中的液体变成蒸气,从而对隔膜机构产生压力。 隔膜将该蒸汽压力转换为机械压力表读数。 对于A20T和A25T系列,量规指针用作温度指示器和一个开关极,当触摸可调式限位触点时,它就完成了电路。 触点与地面隔离。 它们具有自清洁动作,可增强电连续性。

 

冷却液或油温

  • A20T和A25T系列 Swichgage
    对于这些型号, Swichgage 指针具有可调节的触点,以完成飞行员回路。
  • A20TL和A25TL排气量仪
    用于福特Worldwide发动机。 随附特殊的感应灯泡。
  • A20TE (原为A20ESR) 和A25TE (原为A25ESR) 带内部SPDT快动开关而不是单极/指针触点的 Swichgage仪器内部快动开关
    型号。 当开关在温度上升时闭合时,它就被置位。 随着温度降低,开关复位。
    型号A25TE被CSA列为非危险区域。
    型号A25TE-EX已通过CSA认证,属于I类1区C和D组危险区域。
  • A20TABS和A25TABS压力仪表
    与A20 / A25T相同,带有用于预报警的内部SPDT快动开关。

气缸盖温度

  • A20TH (原为A20TL8133) 和A25TH (原为A25TL8133) 压差仪
    用于风冷发动机。

仅限量规模型

  • A20TG和A25TG MurphyGage
    压力计,无触点。

 

A20T / A25T直感式温度表,温度量程32-120℉(0-45℃)至300-440℉(160-220℃),表体材料为聚碳酸酯,防腐蚀能力强,表盘采用全抛光不锈钢,外观简单大方。

特点:
1、仪表精度高过正负2%以上;
2、可调可视压力报警点;
3、集压力显示和压力开关于一体;
4、通过美国SAE标准等。

 

 

Part Number Description
05702176 A20 Series Clamp Lite Assembly; 12V
05702177 A20 Series Clamp Lite Assembly; 24V

All configurations may not be available. Call your sales representative or Enovation Controls for more information.

 

 

MURPHY A20 Series (2 inch/51 mm dial) and the A25 Series (2-1/2 inch/64 mm dial) Swichgage models are diaphragm-actuated, temperature-indicating gages, with built-in electrical switches for tripping alarms and/or shutdown devices.

Ranges are available from 32°-120°F (0°-45°C) through 300°-440°F (160°-220°C).

All models of these rugged, built-to-last instruments are fully sealed from the environment by the unique combination of a polycarbonate case and lens, a polished stainless steel bezel and O-ring seals.

These vapor/pressure actuated gages feature a sealed capillary tube and a sensing bulb. When subjected to heat, the liquid in the sensing bulb changes to vapor creating pressure against a diaphragm mechanism. The diaphragm translates this vapor pressure into a mechanical gage reading.

For series A20T and A25T, the gage pointer acts as a temperature indicator and as one switch pole which completes a circuit when it touches the adjustable limit contact. Contact(s) are isolated from ground. They have a self-cleaning motion to enhance electrical continuity.

Models A20TE and A25TE have internal snap-acting SPDT switches.

Gage-only models, without contacts (Murphygage) are also available.

Applications for A20 and A25 Series temperature Swichgage instruments include: engines and equipment in the oil field, marine, irrigation, construction and trucking industries, monitoring engine coolant temperature, crankcase oil, transmission oil.

 

Base Models

Coolant or Oil Temperature
A20T and A25T Series Swichgage : For these models the gage pointer makes with an adjustable contact to complete a pilot-duty circuit.

A20TL and A25TL Swichgage : For use on Ford Worldwide engines. Supplied with special sensing bulb.

A20TE and A25TE Swichgage : A20TE (was A20ESR) and A25TE (was A25ESR). Models with internal SPDT snap-switches, instead of the single pole/pointer contact(s). When the switch closes on rising temperature, it becomes set. As temperature decreases the switch resets.
Model A25TE is CSA listed for non-hazardous areas.
Model A25TE-EX is CSA listed for Class I, Division 1,
Groups C & D hazardous areas.

A20TABS and A25TABS Swichgage : Same as A20 and A25T with internal SPDT snap-switch for pre-alarm.

Cylinder Head Temperature
A20TH and A25TH Swichgage : A20TH (was A20TL8133) and A25TH (was A25TL8133). For use on air-cooled engines.

Gage–Only Models
A20TG and A25TG Murphygage : Gage without contact(s).

Specifications

  • Dial: White on black; U.S.A. standard scale is dual scale °F/°C; others available
  • Case: Glass filled/Polycarbonate, corrosion-resistant; steel mounting clamp included
  • Bezel: Polished stainless steel, standard; others are available.
  • Pointer: Tempered nickel silver; red tip
  • Lens: Polycarbonate, high-impact
  • Sensing Element: Beryllium copper diaphragm
  • Capillary: PVC armored copper; 4 ft. (1.2 m).* Stainless steel armor optional
  • Sensing Bulb: Copper*
  • Gage Accuracy: See accuracy chart
  • Maximum Temperature: See Temperature Ranges and Factory Settings table
  • Maximum Ambient Temperature: -40°F (-40°C) through 150°F (66°C)
  • Adjustable Limit Contact (A20T and A25T):
  • SPST contact; pilot-duty only, 2 A @ 30 VAC/VDC; isolated from case ground
  • Closed when the high limit is met. Normally Open when pointer is in normal operating range. Contacts are gold flashed silver.
  • Limit Contact Adjustment: by a 1/16 in. hex wrench through 100% of the scale.
  • Wiring: A20T: Number 4 screw terminals; A25T: Number 6 screw terminals.
  • Snap-Switch Rating (A20TE and A25TE):
  • SPDT, 3 A@ 30 VDC inductive; 4 A @ 125 VAC inductive
  • Wiring: A20TE: Number 4 screw terminals; A25TE: Number 6 screw terminals
  • Unit Weight: A20 Series: 11.9 oz. (0.370 kg); A25 Series Models: 13.3 oz. (0.413 kg)
  • Unit Dimensions: A20 Series: 4-3/4 x 4-3/4 x 3 in. (121 x 121 x 76 mm); A25 Series Models: 4-3/4 x 4-3/4 x 2-3/4 in. (121 x 121 x 70 mm)

*For optional capillary lengths, engine adapters, sensing bulbs and range combinations, see Murphy bulletin 8428 .

 

- 产品技术资料下载For more information about this product, you can download the related literature here:

 

 

A20T-250-4-1/2 (10703159): Temperature Swichgage

A20T-250-6-1/2 (10703160): Temperature Swichgage
A20T-250-8-1/2 (10703161): Temperature Swichgage
A20T-250-10-1/2 (10703162): Temperature Swichgage

A20T-250-12-1/2 (10703163): Temperature Swichgage A20T-250-16-1/2 (10703165): Temperature Swichgage
 
A20T-250-20-1/2 (10703167): Temperature Swichgage
A20T-250-25-1/2 (10703168): Temperature Swichgage  

 

Murphy船用温度仪表

A20T和A25T系列温度SWICHGAGE开关表
-2和2.5英寸
-用于冷却水或机油温度
-量程范围220℃
-触头不接地
-对特殊要求可选用不同的温度传感头和连接螺纹
-表面有可调节高限触点

A20TE和A25TE系列
-除了带微动开关外,与A20T和A25T相似
-工厂设定开关点
-A25TE是CSA标准确认的非危险场地使用
-A25TE-EX是CSA标准确认的等级C和D危险场地使用
MURPHYGAGE表系列,只有仪表指示,没有限制触头
-A系列无限制开关触点
-A20TG,直径2英寸
-A25TG,直径2.5英寸

Murphy A20 Series Temperature Swichgages
A20T-250-4-1/2 (10703159): Temperature Swichgage
A20T-250-6-1/2 (10703160): Temperature Swichgage
A20T-250-8-1/2 (10703161): Temperature Swichgage
A20T-250-10-1/2 (10703162): Temperature Swichgage
A20T-250-12-1/2 (10703163): Temperature Swichgage
A20T-250-16-1/2 (10703165): Temperature Swichgage
A20T-250-20-1/2 (10703167): Temperature Swichgage
A20T-250-25-1/2 (10703168): Temperature Swichgage

 


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