Dwyer PG系列 气用微压力/微差压开关

产品中心 > 压差开关 > Dwyer PG系列 气用微压力/微差压开关

Dwyer PG系列 气用微压力/微差压开关

适用于天然气,合成气和液化石油气。
PG系列气体压力/压差开关,结合大型敏感隔膜和可靠的、时间证明机械设计。适用于空气和其他兼容气体,具有良好的±1%的满量程重复性,清晰易读的刻度和方便的外部设定点调整,通过各种开关选项(包括SPST、SPDT、DPST和DPDT),在增加压力、真空或差压时打开或关闭,保证了应用的灵活性。PR和PRL型号在增加或减少压力时增加手动复位操作。水银开关或密封的快速开关适用于高湿度场合。如果振动或其他因素阻止汞的使用,可以提供快速开关。标准封装为NEMA 1。可供选择的外壳有全天候防护型和防爆型。

材质:Fairprene,黄铜,钢,和铝
温度范围:-10 至180°F (-23 至82°C

压力范围:单压力用于“高”端:持续压力:15 Psig(1.0 Bar),冲击压力:(20 Psig(1.4 Bar
差压:持续压力,量程P1:2 Psig(.14 Bar),持续压力,量程P2:10 Psig(0.7 Bar
防护等级:普通用途。可选择全天候和防爆
重复性:满量程的±1%
开关类型:SPST 水银开关,SPDT 水银开关,SPDT 快速开关,或SPDT 密封快速开关。可选择DPDT。
电气额定:SPDT 水银开关:4A @ 120 VAC/VDC, 2A @ 240VAC/VDC. SPST 水银开关:6A @ 120 VAC/VDC, 3A @ 240VAC/VDC. SPDT干接点:15A @ 120 VAC, 8A @ 240 VAC, 0.5A@ 120 VDC, 0.25A @ 240 VDC. SPDT H.S. 镀银干接点:5A @125/250 VAC, 30 VDC Resistive. SPDT H.S. 镀金干接点:1A @125 VAC, 30 VDC Resistive
电气连接:旋紧型
导管接口:对1/2?(12.7 Mm)集线管,7/8?(22.23 Mm
)孔
连接:1/2"NPT 外螺纹和1/8"NPT 内螺纹为使用单正压或高
差压,1/8"NPT 
内螺纹为使用单真空或低差压
安装定位:垂直
设定点调节:外部螺丝
重量:4.5 Lb(2 Kg)
死区:见型号表
机构认证:对水银开关型号,UL,CSA,FM 认证。仅快速开关型有UL认证


选型表:

举例PG
153P1
PG-153-P1 (真空) (压力) (差压)控制, 固定死区, 自动复位, SPDT 水银开关, 可调范围1.0-30" w.c. (25-760 bar).
MODELPG



通用封装, NEMA-1 (标准)
PR



手动复位, 压力上升时自动操作,下降时复位
PRL



手动复位, 压力下降时自动操作,上升时复位
HOUSING
OPTIONS

W


防水, NEMA-2, 3R
CIRCUIT
(SWITCHING)
OPTIONS

(For Electrical
Codes see Chart
Below)


2

SPST 水银开关, elect. code K†, opens on vacuum, pressure or differential pressure increase


2P

SPST 水银开关, elect. code L†, opens on vacuum, pressure or differential pressure increase


3

SPST水银开关, elect. code K†, closes on vacuum, pressure or differential pressure increase


3P

SPST 水银开关, elect. code L†, closes on vacuum, pressure or differential pressure increase


153

SPDT 水银开关, elect. code M†


103

DPST, two SPST 水银开关, elect. code L†, both close on increase, FM approved, PG, PGW only


105

DPST, two SPST 水银开关, one elect. code L†, one elect. code N, both open on decrease


119

(2) 水银开关, SPST NO (DPST)


127

DPST, two SPST 水银开关, elect. code L†, both open on increase


129

DPST, two SPST水银开关, one elect. code L†, one elect. code N, both open on increase


131

(2) 水银开关, SPST NC (DPST)


152

(1) 水银开关, SPDT (4-wire)


156

SPDT, two SPST水银开关, elect. code L†, one- opens on increase, one closes on increase


158

SPDT, two SPST水银开关, one elect. code L† - opens on increase, one elect. code N - closes on increase


161

SPDT, two SPST水银开关, one elect. code L† - opens on decrease, one elect. code N - closes on decrease


190

(2) 水银开关, SPST NC; SPST NO (SPDT)


804

DPDT, two SPDT 水银开关, elect. code M†


(__)

Other circuits available, consult factory


7000-153

SPDT, 干接点开关, rated 15A at 120 VAC, 8A at 240 VAC, 0.5A at 120 VDC, .25A at 240 VDC (1)


7000-153HS

SPDT, 密封的干接点开关, rated 5A at 125/250 VAC, 5A resistive at 30 VDC


7000-153HG

SPDT, 密封的金触点开关, rated 1A at 125 VAC, 1A resistive at 30 VDC


7200-804

DPDT, two SPDT 干接点开关, rated 5A at 120/240 VAC, 30 VDC resistive (1)
ADJUSTABLE DIFFERENTIAL
PRESSURE RANGES WITH MAXIMUM
SUSTAINED PRESSURES



P1
Adjustable range 1.0-30" w.c. (25-760 bar), maximum sustained pressure 2 psig* (0.14 bar)



P2
Adjustable range 0.5-5 psig (.03-.35 bar), maximum sustained pressure 10 psig* (0.69 bar)



P3
Adjustable range 2.5-76.3cm w.c.
OPTIONS



ATRAluminum Tag (Riveted)




ATWAluminum Tag (Wired)




PEPrep for EP




PRESETPreset and Pressure Check Set Point




PTPaper Tag




STRStainless Steel Tag (Riveted)




STWStainless Steel Tag (Wired)




23720Fungus Proofing Special 23720




23444O2 Acetylene Special 23444




RCHRigid Conduit Hub
*Maximum sustained pressure 15 psig (1.0), maximum surge limit 20 psig (1.4), both ranges when used as single pressure switch with low pressure port vented to atmosphere.
1 7000-153 and 7200-804 not available with PR or PRL manual reset.
 †See Electrical Rating Chart Below.

ELECTRICAL RATINGS - Mercury Switch

CODE
RATING AC or DC
K
6A at 120 V, 3A at 240 V
L
10A at 120 V, 5 A at 240 V
M
4A at 120 V, 2A at 240 V
N
1A at 120 V, 0.5A at 240 V



//网页复制禁止