|
MURPHY 20P / 25P Series Mechanical Pressure Gauges Murphy压力表
Murphy 20 Series Pressure & Vacuum Swichgages
20P / 25P Series Pressure Swichgage? | Murphy by Enovation Controls
Murphy Swichgage 20系列（2英寸/ 51毫米刻度盘）和25系列（2-1 / 2英寸/ 64毫米刻度盘）是隔膜驱动的压力指示压力表，带有内置电气开关。这些开关超过了SAE标准，用于触发警报和/或关闭设备。
该Swichgage ?是专为保护发动机/设备在油田，海洋，水利，建筑和货运应用程序来监视发动机润滑油压力，水泵压力，水压，气压等。
MURPHY 20P / 25P Series Mechanical Pressure Gauges Murphy压力表
Murphy 20 Series Pressure & Vacuum Swichgages
20P / 25P Series Pressure Swichgage | Murphy by Enovation Controls
-
表盘 ：黑底白字，双重美国/英国标准刻度（美国标准刻度为psi / kPa；英国标准刻度为psi / bar） 请参阅如何订购]
-
外壳材质 ：20和25系列：电镀钢
-
挡板： 抛光不锈钢，标准； 其他可用
-
镜片： 聚碳酸酯纤维，耐冲击
-
指针： 钢化镍银
-
油： 硅油
-
环境温度范围： -40°F（-40°C）至150°F（66°C）
-
过程连接 ：1 / 8-27 NPTM黄铜。
-
传感元件 ：铍铜膜片。
-
量具精度 ：请参见下载公告
-
最大压力： 请参阅下载中的公告
-
可调限位触点 ：SPST触点； 仅限飞行员，2 A @ 30 VAC / DC; 达到下限时，通常关闭（NC）。 当指针在正常操作范围内时，常开（NO）。 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％。
-
极限接触导线 ：18 AWG（1.0 mm 2 ）x 12 in。（305 mm）
-
快动开关额定值 （20PE / 25PE型号）：SPDT，3 A @ 30 VDC感性； 4 A @ 125 VAC感性
-
快动开关导线 （20PE / 25PE型号）：20 AWG（0.75 mm2）x 12 in。（305 mm）
-
单位重量和尺寸 ：请参见下载公告
20P和25P系列Swichgage
量具指针带有可调节触点，以完成飞行员电路。
20PE和25PE Swichgage 20PE （原为20EO） 和25PE （原为25EO）
具有内部 速 动SPDT开关，而不是单极/指针触点。 当开关在下降压力下闭合时，它会随着压力的升高而置位，开关会复位。
20PABS和25PABS转换
与20P和25P相同，带有用于预报警的内部SPDT快动开关。
20P7和25P7锁定范围
与20P和25P系列相同。 它们还包括用于启动覆盖的前半自动锁定。 启动时，此内置设备将指针保持在远离触点的位置。 当压力超过设定点时，锁定将自动解除（有关详细信息，请参见下载中的公告）。
20PG和25PG MurphyGage量
无触 点
20P/25P系列压力开关表
-2英寸和2.5英寸（51mm和64mm）
-量程达400psi(2.76MPa)(27.60bar)
-表面可调节开关接触点
20PE和25PE系列
-除了带微动开关外，与20P/25P相似
-出厂设定开关点
MURPHY 20 Series (2 inch/51 mm dial) and the 25 Series (2-1/2 inch/64 mm dial) Swichgage models are diaphragm-actuated, pressure-indicating gages with built-in electrical switches. These switches exceed SAE standards and are used for tripping alarms and/or shutdown devices.
Ranges are available from 0-15 psi (103 kPa) [1.0 bar] through 0-400 psi (2.8 MPa) [28 bar].
The gage mechanism is enclosed in a steel case coated to resist corrosion. A polycarbonate, break-resistant lens and a polished, stainless steel bezel help protect this rugged, built-to-last instrument. Accuracy and protection from moderate overpressure is assured by a unique, unitized diaphragm chamber. A built-in pulsation dampener helps eliminate pointer flutter and is removable for cleaning. For models 20P and 25P, the gage pointer acts as a pressure indicator and as one switch pole which completes a circuit when it touches the adjustable limit contact. Contacts are grounded through the case and have self-cleaning motion to ensure electrical continuity.
Models 20PE and 25PE have internal snap-acting SPDT switches.
Gage-only models, without the switches (Murphygage?) are also available.
The Swichgage was specifically designed to protect engines/equipment in oil field, marine, irrigation, construction and trucking applications to monitor engine lube pressure, water pump pressure, hydraulic pressure, air pressure, etc.
Base Models
20P and 25P Series Swichgage
The gage pointer makes with an adjustable contact to complete a pilot-duty circuit.
20PE and 25PE Swichgage
20PE (was 20EO) and 25PE (was 25EO)
Features internal snap-acting SPDT switches, instead of the single pole/pointer contacts. When the switch closes on falling pressure, it becomes set, as pressure rises the switch resets.
20PABS and 25PABS Swichgage
Same as 20P and 25P with internal SPDT snap-switch for pre-alarm.
20P7 and 25P7 Lockout Swichgage
Same as 20P and 25P Series. They also include a front, semi-automatic lockout for startup override. This built-in device holds the pointer away from the contact on startup. When pressure exceeds the set point, the lockout is automatically disengaged (see following pages for details).
20PG and 25PG Murphygage
Gage without contact(s)
Specifications
Dial: White on black, dual scale; U.S.A. standard scale is psi/kPa; U.K. standard scale is psi/bar; others available (see How to Order).
Case: Plated steel; mounting clamp included (except for direct mount models).
Bezel: Polished stainless steel, standard; others are available (see How to Order).
Lens: Polycarbonate, high-impact.
Oil: Silicon Oil.
Temperature Range: Ambient: -40°F (-40°C) thru 150°F (66°C); Process: -40°F (-40°C) thru 250°F (121°C).
Process Connection: 1/8-27 NPTM brass.
Sensing Element: Beryllium copper diaphragm.
Gage Accuracy (% of Full Scale):
| RANGE |
LOWER 1/4 |
MIDDLE 1/2 |
UPPER 1/4 |
| ≤300 psi (20 Bar) |
±3% |
±2% |
±3% |
| 400 psi (28 Bar) |
±3% |
±3% |
±5% |
Maximum Pressure: See Pressure Ranges and Factory Settings.
Adjustable Limit Contact (20P and 25P): SPST contact; pilot- duty only, 2 A @ 30 VAC/DC; Normally Close (NC) when the low limit is met. Normally Open (NO) when pointer is in normal operating range. Contacts are gold flashed silver.
Limit Contact Adjustment: by a 1/16 in. hex wrench thru 100% of the scale.
Limit Contact Wire Leads: 18 AWG (1.0 mm2) x 12 in. (305 mm).
Snap-Switch Rating (20PE and 25PE): SPDT, 3 A@ 30 VDC inductive; 4 A @ 125 VAC inductive. Snap-Switch Wire Leads: 20 AWG (0.75 mm2) x 12 in. (305 mm).
Unit Weight:
- 20 Series: 8 oz. (0.23 kg).
- 25 Series Models: 11 oz. (0.31 kg).
Unit Dimensions:
- 20 Series: 3 x 3 x 3 in. (76 x 76 x 76 mm).
- 25 Series Models: 4-3/4 x 4-3/4 x 2-3/4 in. (121 x 121 x 70 mm).
- 产品技术资料下载For more information about this product, you can download the related literature here:
二、20DP/25DP系列压差式SWICHGAGE压力开关表
-2英寸和2.5英寸（51mm和64mm）
-表面可调节高触点
-适用于机油、燃油和水滤清器阻力测定
三、20V/25V系列真空SWICHGAGE开关表
-2英寸和2.5英寸（51mm和64mm）
-0-20或0-30英寸汞柱（0-68 or 0-102kPa）(0-68 or 0-102bar)
-表面可调节高低限位触点
四、MURPHYGAGE表系列，只有仪表指示，没有限位点
-20BPG:表盘直径2英寸(51mm),适用于压力
-25PG:表盘直径2.5英寸(64mm),适用于压力
-20BVG:表盘直径2英寸(51mm),适用于真空（汞柱）
-20VWCG/25VWCG:表盘直径2英寸和2.5英寸, 适用于真空（水柱）
-20DPG/25DPG:表盘直径2英寸和2.5英寸, 适用于压差
五、20VWC和25VWC系列
-2英寸和2.5英寸（51mm和64mm）直径
-0-30 or 0-50in水柱
-用于空气阻力指示
-表面可调节高低限位点
Murphy 20P Pressure Swichgages
Murphy 25 Series Pressure & Vacuum Swichgages
 |
 |
 |
25P-100 (05704033): Pressure Swichgage
|
25P-300 (05704036): Pressure Swichgage |
20P-15 (05703101): Pressure Swichgage |
 |
 |
 |
| 20P-30 (05703104): Pressure Swichgage |
20P-50 (05703107): Pressure Swichgage |
20P-75 (05703110): Pressure Swichgage |
 |
 |
 |
20P-100 (05703115) : Pressure Swichgage
|
20P-150 (05703121): Pressure Swichgage |
20P-200 (05703122): Pressure Swichgage |
 |
 |
|
20P-300 (05703124): Pressure Swichgage
|
20P-400 (05702505): Pressure Swichgage |
|
Murphy 20P Pressure Swichgages
Murphy 25 Series Pressure & Vacuum Swichgages
25P-100 (05704033): Pressure Swichgage
25P-300 (05704036): Pressure Swichgage
20P-15 (05703101): Pressure Swichgage
20P-30 (05703104): Pressure Swichgage
20P-50 (05703107): Pressure Swichgage
20P-75 (05703110): Pressure Swichgage
20P-100 (05703115) : Pressure Swichgage
20P-150 (05703121): Pressure Swichgage
20P-200 (05703122): Pressure Swichgage
20P-300 (05703124): Pressure Swichgage
20P-400 (05702505): Pressure Swichgage
|
