Pressure sensors-relays comply with TU RB 200020142.025-2000.

Designed for use in monitoring, control and regulation systems overpressure(pressure) and vacuum pressure (thrust) of gas burner devices, household heating installations and in technological pipeline systems to control the flow of natural, liquefied gas, air and other gaseous non-aggressive media. Designation structure: DRD - X X X 1 2 3 4 5 1 - DRD- series designation 2 - Hyphen 3 - Upper limit pressure setting (mbar) 4 - Sensor version: N- for overpressure T- for vacuum pressure 5 - Sensor setting type (except for DRD-...T): A- to increase the measured pressure B- to reduce the measured pressure The sensor housing parts are made of corrosion-resistant materials (alloys of non-ferrous metals, high-strength plastic, oil- and petrol-resistant rubber). The sensor membrane is made of rubberized fabric and can withstand pressure up to 1.5 bar. The lid is made of transparent plastic. The response pressure is set using a scale screw. Electrical wires are connected with contact clamp screws.

Sensor name	Type of pressure measured	Dimensions, mm			Pressure range, mbar	Return zone, mbar	Weight, kg
		Length	Width	Height
DRD-12	Excess pressure (pressure)	80	60	70	3...12	1...3	0,35
DRD-40					10...40	2...5
DRD-120					30...120	10...30
DRD-400					100...400	20...80
DRD-1000					200...1000	20...100
DRD-5N		90	80	80	0,6...5	0,4...1,4	0,45
DRD-10N					1...10	0,5...2
DRD-50N					5...50	1,5...12
DRD-300N					30...300	12...40
DRD-1000N					200...1000	40...100
DRD-5T	Vacuum pressure (thrust)	104			0,6...5	0,4...1,4	0,75
DRD-10T					1...10	0,5...2
DRD-50T					5...50	1,5...12

Are common specifications pressure sensors: Climatic version - U3.1 (-30...+60°С). Working environment temperature - -30°С...+60°С Degree of protection according to GOST 14254 - IP54 The amount of external leakage is no more than 20 cm3/h The resource of inclusions is at least 9 years. It is preferable to install the sensor in a position where the membrane is in a vertical position. When installing the sensor differently, errors occur due to the influence of the mass of moving parts, which requires additional adjustment. It is also not recommended to place the sensor with the stuffing box facing up to avoid moisture and condensation getting inside the sensor (the recommended position is with the stuffing box facing down). Electrical wires are connected to the sensor contacts using clamping screws. To connect wires, it is recommended to use fork lugs in accordance with GOST 22002.3. The design of the sensor allows the use of a cable with a diameter of no more than 10 mm. Sensor-relays are designed for switching power of no more than 300 VA (cos φ=0.6) at a voltage of 220 V for alternating current circuits with a frequency of 50 Hz and 70 VA at a voltage of 24 V for direct current.

If you want to buy reinforcement in quantities over 10 tons. DELIVERY in Moscow FOR FREE!!!
There is a discount system.
Constant quality control of metal products - A500C and A3 fittings. Buy fittings wholesale at special conditions from 20 tons of products.

New arrival:

The price is indicated per ton per b/n calculation:

159*4- 32300 rub.-9 tons
159*4.5-32000r.-2 ton
159*5-31800r.-6 tons
159*6-32200r.-4 tons

Our organization offers a huge range of black steel pipes

Today, ferrous metal pipes are the most common type of pipes used in many industries. Black pipes are actively used in agriculture, oil and gas sector, chemical industry, mechanical engineering, private and commercial construction. On Russian market they are found as black pipes or ferrous metal pipes.

Typically, black pipes are made of steel or cast iron. They are produced in accordance with modern GOSTs of the Russian Federation and TU ( technical specifications). The Steel-Pro company offers a wide range of ferrous metal pipes, which are characterized by high strength and reliability.

Metal mesh

Thanks to your design features, steel mesh has found wide application in various industries industries: mechanical engineering, construction, mining, agriculture, food industry, and also used as fences and enclosures for personal purposes.

Our company invites you to familiarize yourself with the assortment metal mesh, which is represented by such positions as road mesh, masonry mesh, plaster mesh, reinforcement mesh, facade mesh, chain-link mesh, galvanized net, reinforced mesh, stainless steel mesh, TsPVS mesh (all-metal expanded metal mesh) and other construction steel mesh.

The housing parts of the pressure sensor-relay are made of corrosion-resistant materials (alloys of non-ferrous metals, high-strength plastic, oil- and petrol-resistant rubber). The sensor membrane is made of rubberized fabric. The lid is made of transparent plastic.

They are connected to the system using threaded (G1/4) holes A and B. Moreover, if pressure is supplied through hole A, hole B is closed with a plug and vice versa. Overpressure sensors-relays DRD are connected to the system using threaded (G1/4) holes A and B. Moreover, if pressure is supplied through hole A, hole B is closed with a plug and vice versa. It is recommended to install in a position where the diaphragm is vertical (the sensor is factory set for operation in this position). With another installation, errors arise due to the influence of the mass of moving parts, which requires additional adjustment of the sensor using a reference pressure gauge. If necessary, they can be connected into blocks (for example, if it is necessary to control the upper and lower pressure limits).

General technical characteristics:

Parameter name	Meaning
Working environment temperature, °C	from minus 30 to plus 60
Degree of protection according to GOST 14254	IP54
Amount of external leakage,cm 3 / h of air, no more	20
Inclusion resource, not less	200 000
Average term service, years, not less	10

Modifications

dimensions DRD series gas pressure switches ( membrane type)

Technical data:

Parameter name	DRD-12 A (B)	DRD-40 A (B)	DRD-120 A (B)	DRD-400 A (B)	DRD-1000 A (B)
Lower pressure setting limit	3 mbar	10 mbar	30 mbar	0.1 bar	0.2 bar
Upper limit pressure setting	12 mbar	40 mbar	120 mbar	0.4 bar	1.0 bar
Maximum operating pressure	0.6 bar			1.5 bar
Response spread, % of the upper limit of the setting, no more	±15
Return zone, % of the upper limit of the setting, no more	40	20
Weight, kg, no more	0,35

Operating principle and scope of application of RD pressure sensors and switches

Operating principle of the RD sensor-relay(pressostat, alarm) is as follows: when the pressure value in the controlled system reaches a certain preset setpoint, the single-pole changeover contact (1SPDT *) switches and the relay is activated, closing or opening electrical circuit. At the moment when the pressure changes (falls) by the amount of the adjustable differential (ΔP), the relay automatically returns to its original position, therefore pressure switch sensors belong to the category of automatic devices.

The versatility of the pressure switch lies in the ability to work both with increasing and decreasing pressure.
The design of many RD sensor-relays and their switching ability* allows them to be used directly when controlling pumps or other actuators without additional devices(intermediate relays, contact relief devices, etc.).

Scope of application of the RD pressure switch: heat supply systems, ventilation, water supply, engineering industry, protection of various mechanisms, in particular, pressure switches are installed in pumping units to protect against dry running caused by a sharp decrease in pressure in the system. In RD compressors, the unit operates in automatic mode.
RD models are also widely used in air conditioning systems, refrigeration units, boiler rooms, boiler rooms, heating points, fire extinguishing systems, compressor rooms and other industrial, energy and housing and communal services facilities - housing and communal services, where reliable and accurate on-off relay control of a given pressure threshold is required.

The main areas of application of the RD pressure switch:
— Heat supply
— Water supply
- Ventilation
— Air conditioning
— Fire fighting

Additional equipment for sensors, relays and pressure alarms

Connection to the process (pressure supply to the device inlet):
Mounting fittings: selecting devices (OU): bosses, bends (including Perkins loops)
Impulse tubes (usually a copper tube D=6,8,10 mm for flaring (nut), soldering (nipple) or with fittings)).
Pressure gauge taps (up to 16/25 bar) or valves/valve blocks (over 2.5 MPa).
Adapters (steel, brass, stainless steel), dampers (hydraulic shock pulsation absorbers), coolers (radiators), membrane separators RM, connecting hoses mod-55004.
Set of mounting (KMCH) and connecting (KPC) parts.
At the outlet of the device:
Secondary devices and automation with relay inputs (controllers, regulators, etc.).
Electromagnetic (solenoid)* and shut-off and control valves KZR.
Installation cable and wires.

Permits and technical documentation

At the request of the consumer, an order card (form) (questionnaire), certificate, permits for use, product passport, technical description and instruction manual, type description and setting procedure, as well as other permitting and technical documentation.

The detailed technical description and operating instructions contain the following sections:
— purpose, description and designation of types (brand, model);
— technical data (such characteristics: measurement range (setpoint settings) and permissible response error, etc.);
— device and operation (principle of operation, design, etc.);
— operating conditions, degree of protection and stability;
— installation, seals, storage conditions;
— indication of safety measures during installation and operation;
— conditions of storage, transportation, rules of installation, operation and dismantling;
— methodology for setting up and re-setting;
— Maintenance and repairs (malfunctions, causes, methods and solutions);
— packaging, labeling, transportation labeling;
— weight, overall and connecting dimensions;
— optional equipment, spare parts and accessories (spare parts).

*- Additional information, definitions, concepts and explanations

Switching capacity(switching wear resistance of contacts) relays are characterized by the value of the power they switch, at which the contacts perform a certain number of switchings.
Switching capacity of contacts, i.e. the conditions under which the contacts operate reliably during the required service life depend, firstly, on the properties of the switched circuit, secondly, on the duration of the passage of current through the contact and, thirdly, on the switching speed.
In cases where the switching capacity of the control key contacts is insufficient, the circuit remote control supplemented by contactors - devices that are capable of switching significant currents.

Designation of relay contacts in the diagrams - SPST and SPDT:
On the diagrams and on the relay housings you can find American and English designations for contacts of the following type:
SPST - single pole, single throw: normally closed (SPST-NC or A form contact) or normally open (SPST-NO or B form contact) contact;
SPDT - single pole, double throw: switching contact (SPDT-C/0 or C-form contact).

Electromagnetic (solenoid) valve- an electromechanical device designed to regulate the flow of all types of liquids and gases. Such a valve consists of a body, a solenoid (electromagnet) with a core on which a disk or piston is installed that regulates the flow.

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GC Teplopribor - production and supply of instrumentation and automation: Sensors-relays/indicators of excess pressure and vacuum (pressostats), see technical description/characteristics, price list (wholesale price), how to order and buy inexpensive RD at manufacturer's price in stock or on order with warehouse in Moscow, delivery/shipment to TC (Business Lines and others) throughout the Russian Federation.

We thank you in advance for contacting any of the enterprises of the Teplopribor group of companies (Teplopribory, Prompribor, Teplokontrol and others) and we promise to make every effort to justify your trust.

ATTENTION! Be careful when choosing a supplier - on the Russian market of pressure monitoring devices there are cheap, low-quality copies of sensors-relays (alarms) of excess pressure (pressure) and vacuum (thrust): analogues, fakes and illiquid goods, deprived of proper service, guarantees, with less or expiring warranties terms, without additional options and fully equipped; therefore, perhaps having more low price than original products.

3.2.2. Pressure difference sensors-relays (differential) 3.3. Pressure gauges, Pressure gauges, Differential pressure gauges 3.4. Metrological equipment 3.5. Additional equipment (pressure) 4. Flow 5. Level 6. Automation and secondary devices 7. Analytics

Group of companies (GK) "Teplopribor" (Teplopribory, Prompribor, Heat control, etc.)- these are instruments and automation for measuring, monitoring and regulating the parameters of technological processes (flow metering, heat control, heat metering, control of pressure, level, properties and concentration, etc.).

At the manufacturer's price, products are shipped as own production, as well as our partners - leading factories - manufacturers of instrumentation and automation equipment, control equipment, systems and equipment for control technological processes— Process control system (much is available in stock or can be manufactured and shipped in the shortest possible time).

Pressure switches DRD, DRD-N, DRD-T

Permits and technical documentation for RD DRD

At the request of the consumer, an order card (form) (questionnaire), a certificate, permissions for use, a product passport, a technical description and operating manual for the RD DRD, a description of the type and setting procedure, as well as other permitting and technical documentation can be sent.

The detailed technical description and operating instructions contain the following sections:
— purpose, description and designation of types (brand, model);
— technical data (such characteristics: measurement range (setpoint settings) and permissible response error, etc.);
— device and operation (principle of operation, design, etc.);
— operating conditions, degree of protection and stability;
— installation, seals, storage conditions;
— indication of safety measures during installation and operation;
— conditions of storage, transportation, rules of installation, operation and dismantling;
— methodology for setting up and re-setting;
— maintenance and repair (malfunctions, causes, methods and solutions);
— packaging, labeling, transportation labeling;
— weight, overall and connecting dimensions;
— additional equipment, spare parts and accessories (SP&A).

We will be glad if the above information was useful to you, and we also thank you in advance for contacting any of the representative offices of the Teplopribor group of companies (three Teplopribor, Teplokontrol, Prompribor and other enterprises) and promise to make every effort to justify your trust..

**Additional information, definitions and clarifications

Switching capacity(switching wear resistance of contacts) relays are characterized by the value of the power they switch, at which the contacts perform a certain number of switchings.
Switching capacity of contacts, i.e. the conditions under which the contacts operate reliably during the required service life depend, firstly, on the properties of the switched circuit, secondly, on the duration of the passage of current through the contact and, thirdly, on the switching speed.
In cases where the switching capacity of the control key contacts is insufficient, the remote control circuit is supplemented with contactors - devices that are capable of switching significant currents.