Boiler Diaphragm Valve

Boiler Diaphragm Valve

Natural Gas Industrial Furnace Boiler Regulating Valve
Maximum Inlet Pressure: 0.4MPa
Outlet Pressure Range: 1-10KPa/1-30KPa (only 50FQD)
Accuracy Class: AC10
Lock-up Pressure Class: SG15
Working Temperature: -19 ~ +60℃
Specs: DN25, DN40, DN50

Product Details

Natural Gas Industrial Furnace Boiler Regulating Valve  


diaphragm valve regulator is spring loaded direct acting middle and low pressure regulator, it is applicable to small and middle size users like civilian, residence, hotel, restaurant, it also can be used for low pressure gas fired boiler and small gas direct-fired machine.



Modular Structure Design diaphragm valve

Overpressure Automatic Shut-off

With Director, Outlet Pressure Can Reach 0.1 MPa

Easy Installation and Adjustment, Convenient Maintenance

Online Maintenance



Maximum Inlet Pressure: 0.4MPa

Outlet Pressure Range: 1-10KPa/1-30KPa (only 50FQD)

Accuracy Class: AC10

Lock-up Pressure Class: SG15

Working Temperature: -19 ~ +60℃

Specs: DN25, DN40, DN50

MaterialContact with the product parts


Non contact product parts304(1.4301)
Sealing materialStandardEPDM+PTFE
Pressure Working pressure


TemperatureWorking temperature


Sterilization temperature150℃≤30min
Surface treatmentInternal surface finishRa0.4~0.6μm
External surface finishRa0.8~1.6μm

clamp, weld,thread, flange



Diaphragm valve is a series of sanitary diaphragm valve, it is widely used in wine, dairy products, beverage, food, biological and pharmaceutical industries. Achieving the requirement of control and open/close for the pipeline system.

Work principle

The diaphragm valve is normally closed, where the diaphragm clings to the inner cavity of the valve body and closes the pipeline flow path. When the diaphragm valve needs to be cleaned or opened, the stem moves upward by rotating the handwheel manually or driving the pneumatic control actuator, and the spherical diaphragm bends upward, so that the valve is open and reach the requirement of clean and open. The diaphragm separates the inner cavity of the lower valve body from the inner cavity of the upper valve cover, so that the stem and valve core located in the upper part of the diaphragm are not corroded by the medium, thus the packing sealing structure is eliminated and the medium leakage will not occur. Optimized valve body design made the cleaning liquid discharge fully, do not form a retention phenomenon.


Steel parts: 304 stainless steel, 316L stainless steel

Seals: EPDM+PTFE which are made of imported sealing materials. Using the special technology of kemus, a connecting bolt is combined with EPDM/PTFE to form a whole sealing part. The sealing part and contact part of the PTFE material have good cold resistance(-25℃),with long working temperature reaching +130℃ and sterilization temperature 150℃≤30min, which has good tolerance to various chemical agents and excellent wear resistance to fluids.

Standard design

Standard: DIN, 3A, SMS, ISO, etc.

The parts of diaphragm valves:high temp. handwheel or pneumatic head, diaphragm and body which assemble together with bolts and nuts. The entire valve assembly in meticulously. The actuator is manual or pnuematic, the diaphragm made of artificial rubber which can have all kinds of soft and hard degree.

How to place an order? 

Step 1: please contact with salesman, tell him the URS (user requirements), including item name/size/material/standard. For example: manual diaphragm valve/ DN25, clamp end/ SS316L/ 3A.

Step 2: After you confirm the details with salesman, he will send you an offer accordingly.

Step 3: If you are agree with the price, you can tell the salesman you want to finalize the order.

Step 4:Our sales man will make an Order with you at the first time, then you can pay for it.

Step 5:Will arrange the products as soon as you pay for it and we will delievery you at the speedy way.

KEMUS specialized in various types valves and actuators, such as Angle seat valve, Ball valve, Butterfly valve, Knife Gate valve, Control Valve and Globe valve as a professional manufacturer and seller. Our company upholds breakthrough and innovative concept for users with complete technical support and product services. Products are widely used in petrochemical, textile, industrial, beer and beverage, environmental protection water treatment,food processing and other fields. Products are closely monitored from design until loading for export.

1. Inner Packing: opp bag, then small carton box for each product.

2. Outside Packing: sta ndard exporting carton box or wooden box or as you required,

    Foam outside protecting the valves against damage

3. Usually we ship your order by sea or by express

4. Sample deliver: 3-7days after receiving payment by express;

    100~500pcs: 10~15 working days by ship.

    Above 500pcs: 30~45 working days by ship.

5. We accept T/T Bank transfer, L/C

Customization Acceptale

Welcome to inquiry.

diaphragm valve


Website :

Elaine Zheng

(Sales Director)


Tell: +86 0592 7103069

Phone: +86 18359108305

WhatsApp: +86 18359108305

Skype: Homealine93

Wechat:  +86 18359108305


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