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额定电压: | 220(v) | 类型: | 机械压力开关 |
最大工作压力: | 160bar(pa) | 型号: | dc dca |
额定电流: | 15(a) | 品牌: | wika/威卡 |
机械寿命: | 100(万次) | 产品认证: | ce |
加工定制: | 是 |
wika dc dca 紧凑型差压开关 高静压及高压工作环境 ip65 pn250
compact differential pressure switch
ip 65, for high working pressures pn 250
model dca
compact differential pressure switch model dca
applications
■ differential pressure monitoring and direct switching of electrical loads
■ for gaseous and liquid, aggressive and highly viscous or contaminated media, also in aggressive ambience
■ process industry: chemical/petrochemical, on- and offshore, technical gases, environmental technology,machine building and general plant construction, water treatment, pharmaceutical industry
■ pump monitoring and control / filter monitoring, level measurement in closed tanks
special features
■ ingress protection ip 65, nema 4
■ ambient temperature -30 ... +85 °c
■ 1 switch point, spdt or dpdt with a high contact rating of up to 15 a / ac 220 v
■ working pressure (static pressure) up to 250 bar
deion
these high-quality differential pressure switches have been developed especially for safety-critical applications. the high quality of the products ensures reliable monitoring of your plant. the manufacturer cella is certified to iso 9001.
in production, the switches are traced by quality assurance software at every step and subsequently are 100 % tested.
all wetted parts materials are from stainless steel. each switch family is available in ip 65, ex-ia or ex-d versions.
in order to ensure as flexible operation as possible, thepressure switches are equipped with micro switches, which make it possible to switch an electrical load of up to 15 a / ac 220 v directly. for smaller contact ratings, such as for plc applications, argon gas-filled micro switches with gold-plated contacts can be selected as an option. a dpdt switch is realised through 2 spdt switches, which switch simultaneously within 2 % of the full scale value.
by using a liquid-filled diaphragm measuring cell with fulcrum lever transmission, the model dca pressure switch is extremely reliable and guarantees optimal operating characteristics.
switch points
the switch points can be set to your requirements, free-ofcharge.
please specify:
switch point, switching direction (e.g. switch point: 0.5 bar,falling)
after unscrewing the case cover, switch point adjustment can be made using the adjustment screw. the switch point is settable within the entire measuring range with the following
general rule:
■ define the value a = 2 x repeatability + switch hysteresis
■ if the pressure is rising, the switch point should be set between (min. + value a) up to max. of the setting range
■ if the pressure is falling, the switch point should be set between min. up to (max. - value a) of the setting range
example:
setting range: 0 ... 1 bar with one switch contact
repeatability: 1 % of 1 bar = 10 mbar
switch hysteresis = 15 mbar (see table setting ranges)value a = 2 x 10 mbar + 15 mbar = 35 mbar
if the pressure is rising, the switch point should be set between 35 mbar up to 1 bar.
if the pressure is falling, the switch point should be set between 0 up to 965 mbar.
for optimal performance we suggest the switch point lies between 25 % and 75 % of the setting range.
electrical connection
½ npt female, cable connection using internal terminal block, protective conductor connection using internal and external screw, max. earth cable cross-section 4 mm2
pressure switch certified per:
■ pressure equipment directive 97/23/ec (ped, annex 1,category iv, safety accessories, module b + d)
■ low voltage directive 73/23 eec and 93/68 eec
dielectric strength
safety class i (en 61298-2: 1997-06)
mounting
direct or wall mounting
preferred connection location of the process connection should be below.
weight
approx. 5.4 kg
options
■ other process connection, also with adapter
■ case from stainless steel 316
■ electrical connection 3/4 npt, g 1/2 or m20 x 1.5 (female)
■ cable gland on request
■ 2" pipe-mounting kit (with clamping element)
■ version for off-shore 3) or tropicalised application 3)
■ version for applications to nace 3)
■ version for ammonia applications 3)
■ oil and grease free version for oxygen applications
■ wetted parts made of monel
■ version to
gas ex-ia iic t6 and t4 - dust ex-iad a20 ip65 t85 and t135 3)
electrical characteristics: ui = 30 v
ii = 100 ma
pi = 0.75 w
ci = 0 μf
li = 0 mh
■accessories:
three-way or five-way valve
3) inert gas filled contacts required
approvals and certificates
■ sil 2 version 3)
■ gost-r certificate
■ test certificate *ca* (confirmation of the switching accuracy)
■ test report *cp* (3-time listing of the switch point, requires switch point specification)
■ material certificate 3.1 per en 10204
dimensions in mm
ordering information
model / max. working pressure (static pressure) / sensor code / 2 / switch contact with version / setting range / 2 x process connection / 2 x electrical connection / switch point / switching direction / options
example:dca - h - 2 - 1 - 0/6 bar - 2 x 1/4" npt-f - 2 x 1/2" npt-f
欢迎致电咨询订购wika dc dca 紧凑型差压开关 高静压及高压工作环境 ip65 pn250
电话: 56291930
传真:
qq:823377546 36968574
邮箱:sales@zoriver.cn
公司官网:http://www.zoriver.cn http://www.zoriver.com.cn
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