wika dw10 不锈钢差压开关 静压10bar 测量16mbar ip65 防爆保护

　　differential pressure switch

　　model dw10

　　differential pressure switch model dw10

　　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

　　■ case made of stainless steel

　　■ ingress protection ip 65, nema 4

　　■ ambient temperature -30 ... +85 °c

　　■ 1 or 2 independent switch points, high contact rating up to 15 a / ac 220 v

　　■ differential pressure from 16 mbar, working pressure (static pressure) up to 10 bar

　　 deion

　　these high-quality differential pressure switches have been developed especially for safety-critical applications. high quality and product manufacturing to iso 9001:2000 ensures reliable monitoring of your plant. 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 as standard. each switch family is available in ip 65, ex-ia or ex-d versions (ex-d see model da10, data sheet pv 35.45).

　　in order to ensure as flexible operation as possible, the pressure 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 asfor plc applications, argon gas filled micro switches with gold-plated contacts can be selected as an option.

　　by using a diaphragm measuring cell with fulcrum lever transmission, the model dw10 pressure switch is extremely robust and guarantees optimal operating characteristics.

　　switch points

　　the switch points can be set to your requirements, free-ofcharge.

　　please specify:

　　switch point, switching direction for each contact (e.g. switch point 1: 0.5 bar, falling, switch point 2: 3 bar, rising)

　　with two micro switches, the switch points can be set independently of each other.

　　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 = 2x 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. 8.2 kg

　　options

　　■ other process connection, also with adapter

　　■ electrical connection 3/4 npt, g 1/2, g 3/4 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)

　　■ design per

　　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

　　■ 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

　　ordering information

　　model / switch contacts with version / setting range / 2 x process connection / electrical connection / switch point(s) / switching direction(s) / options

　　example:dw10 - u1 - 0/16 mbar - 2 x 1/4" npt-f - 1/2" npt-f

　　欢迎致电咨询订购wika dw10 不锈钢差压开关 静压10bar 测量16mbar ip65 防爆保护

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