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Sanitary Diaphragm Valve – Application, Working Principle and Material

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Application

RG diaphragm valve is a series of sanitary diaphragm valve, it is widely used on wine, dairy products, beverage, foodstuff industry, pharmacy etc. Achieving the requirement of control and open/close for the pipeline system.

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Working Principle:

The diaphragm is close under normal state, and that moment the diaphragm clung to the valve body cavity, and closing off the flow path through the pipeline. When the diaphragm valve have the requirement to clean or open, the valve stem moves upwards according to the manual or pneumatic actuator equipment, spherical diaphragms naturally bend upwards, so that the valve is open and reach requirement of clean and open. The diaphragm make the lower body cavity and the upper chamber separated from the valve cover, so that the stem at the top of the diaphragm, disc media and other parts from corrosion, eliminating the need for packing structure, and no media leaks. The optimize valve body made the cleaning liquid flow out totally, so that don’t have any entrapment.

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Material:

Steel components: stainless steel 304, stainless 316L.

Seal: EPDM + PTFE the seals are imported seal material (which conform to the FDA177.2600 standard). With riter unique technology, will be a bolt coupling nut with EPDM/PTFE perfect combination into a whole sealing parts, the sealing parts contact with the media of the parts of the PTFE material has good cold resistance (-25°C) excellent heat-resistance (+250°C) of all sorts of chemical preparation is well tolerated and excellent wear resistance to flow.

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Standard Design

Various standards of valves can be provided to clients: DIN, 3A, SMS, ISO/IDF, BS/RJT, ASME/BPE etc.

The parts of valves: an actuator, diaphragm and body which assemble together with bolts and nuts. The entire valve assembly in meticulously. The actuator can be manual and pneumatic, the diaphragm made of artificial rubber which can have all kinds of soft and hard degree. The body can be two way or three way.

The connection of the diaphragm as follows: clamp, weld, T-type tee, U type tee, etc.

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Diaphragm

Parts List

No.

Description

01

Bolt Nut Cap

09

Gasket

02

Bolt

10

Bolt

03

Pneumatic Cap

11

Nut

04

Spring

12

Valve Seat

05

Spring

13

Valve Core

06

Spring

14

Diaphragm

07

Pneumatic

Head Diaphragm

Component

15

Valve Body

08

Pneumatic Head

16

Bolt

Parts List

No.

Description

01

Cap

02

Handwheel

03

Screw

04

Valve Rod

05

Valve Cap

06

Valve Core

07

Diaphragm

08

Valve Body

09

Nut

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Technical Data

Material

Contact with the product components

304L/316L (1.4306/1.4404) Forging

Can provide material inspection report

Material No contact with the product components

304/202 (1.4301/202)

Sealing material

Standard

EPDM+PTFE

Adopt import sealing material, with all the seal material The FDA 117.2600

Option

VMQ

Pressure

Pressure of work

0~10 bar

Control air pressure

5~8 bar

Temperature

Working temperature

VMQ: (-50 ~ +180°C),  EPDM: (-20 ~ +135°C),  FPM: (-30 ~ +230°C)

Sterilization temperature

150°C (MAX 20min)

Surface treatment

Inside surface treatment

Ra ≥ 0.4 - 0.8µm

Surface treatment

Ra ≥ 0.8 - 1.6µm

Connection

The diameter welding

Welding mouth: DIN 11850-2 with 11850-1/SMS/3A/ISO Series etc

Connection mode: welding, fast loading, Union, flange, etc

Pneumatic control

Pneumatic head and fixed bracket

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Optimal Installation Angle Diagram

According to the structure feature, fifteen thirty degree is optimal, which makes for complete drain after cleaning and keep no residue.