The W21 PRV in ½” and ¾” sizes is mostly used for branch lines outside bathroom/kitchen or for safety of individual apparatus like boiler, water purifier etc. The cost economics of UPVC body option has now enabled the use of single stack downtake design with one prv for each bathroom/ kitchen instead of one prv catering to many floors. Perfect for maximized water conservation as this system gives same (optimized) pressure on each floor. Optimized pressure means optimized water consumption. W21 has a built-in filter but misses the "dual open design" as in other models like W3 but none can beat the cost effectiveness of the UPVC W21 in the diaphragm operated category. With the fully loaded brass inserts in the UPVC body this UPVC PRV offers an amazing combination of price and performance with 5 years warranty. .


Material

Body : Bronze body(W21 G) , UPVC with Brass inserts (W21 N & W21 S).
Internals : Brass; Acetal, NBR .
Inbuilt Filter : *available on request
Bonnet : Nylon.
Medium : Water, Compressed air, Nitrogen
Inlet Pressure : Maximum 12.0 kg/cm 2 (at tempratures of 28 Deg Cel)
Max. Temp. : 80° C (W21 G), 55° C (W21 N & W21 S)
Connection size : 15,20 mm
End connections : BSP Female threaded
Outlet Pressure : 1 to 5.0# kg/cm2

#Higher temperatures & inlet pressures on request

To see accessories click here


HTML Table Generator
SIZE (MM) W A B D
15 94.5 19 68.4 57
20 94.5 19 68.4 57
HTML Table Generator
SIZE (MM) W A B D
15 70 60 26 48
20 74 60 26 48

  • Brass Adjustment screw for Easy pressure setting.
  • Lead free UPVC body makes valve light in weight and most safe for drinking water.
  • Y design reduces pressure while retaining adequate flow rates needed by showers etc..
  • Bottom drain plug in W21 N and W21 S helps remove dirt particles when builtin filter is not provided.
  • Since the prv is Diaphragm operated it has better pressure control ,less noise and maintenance compared to the older piston operated PRVs.
  • More over Diaphragm is thin walled , corrugation shaped for better flexibility & smoother operation. Increased surface area of diaphragm reduces overall size of PRV. i.e. compactness.
  • Compact and light weight.
  • Nylon reinforced NBR Diaphragm for better strength and longer life.
  • ‘Cartridge’ design internals - entire working mechanism is in a cartridge which operates independent of the body. Thus, servicing is without removing body from pipeline.
  • In-built provision for inserting pressure gauge.
  • The W21 has a unique inclined seat arrangement which gives more flow capacity as compared to other household PRVS.

W3 - B

Variant Name: W3 - B

Description: W3 is the most commonly used PRV in hi-rise building application as most inlet and outlet pressure needs fall within the W3's specs. Also, the W3 has maximum no. of variants with different choices in body material, filter choices, end connection, spring material etc. click here to see variant options in a table W3. click here to see complete catalogue showing specifications.

Body: Brass

Spring/Spring Plate: Spring Steel

Built-in Filter*: SS 316 - 0.4mm

Easy Clean Attachment: No

owder coating on body No

Bannet: Nylon

Warranty: 5 years

W3 - BSC

Variant Name: W3 - B

Description: W3 is the most commonly used PRV in hi-rise building application as most inlet and outlet pressure needs fall within the W3's specs. Also, the W3 has maximum no. of variants with different choices in body material, filter choices, end connection, spring material etc. click here to see variant options in a table W3. click here to see complete catalogue showing specifications.

Body: Brass

Spring/Spring Plate: Spring Steel

Built-in Filter*: SS 316 - 0.4mm

Easy Clean Attachment: No

owder coating on body No

Bannet: Nylon

Warranty: 5 years

W3 - NF

Variant Name: W3 - B

Description: W3 is the most commonly used PRV in hi-rise building application as most inlet and outlet pressure needs fall within the W3's specs. Also, the W3 has maximum no. of variants with different choices in body material, filter choices, end connection, spring material etc. click here to see variant options in a table W3. click here to see complete catalogue showing specifications.

Body: Brass

Spring/Spring Plate: Spring Steel

Built-in Filter*: SS 316 - 0.4mm

Easy Clean Attachment: No

owder coating on body No

Bannet: Nylon

Warranty: 5 years

W3 - G

Variant Name: W3 - B

Description: W3 is the most commonly used PRV in hi-rise building application as most inlet and outlet pressure needs fall within the W3's specs. Also, the W3 has maximum no. of variants with different choices in body material, filter choices, end connection, spring material etc. click here to see variant options in a table W3. click here to see complete catalogue showing specifications.

Body: Brass

Spring/Spring Plate: Spring Steel

Built-in Filter*: SS 316 - 0.4mm

Easy Clean Attachment: No

owder coating on body No

Bannet: Nylon

Warranty: 5 years

W3 - SC

Variant Name: W3 - B

Description: W3 is the most commonly used PRV in hi-rise building application as most inlet and outlet pressure needs fall within the W3's specs. Also, the W3 has maximum no. of variants with different choices in body material, filter choices, end connection, spring material etc. click here to see variant options in a table W3. click here to see complete catalogue showing specifications.

Body: Brass

Spring/Spring Plate: Spring Steel

Built-in Filter*: SS 316 - 0.4mm

Easy Clean Attachment: No

owder coating on body No

Bannet: Nylon

Warranty: 5 years

W3 - M1B

Variant Name: W3 - B

Description: W3 is the most commonly used PRV in hi-rise building application as most inlet and outlet pressure needs fall within the W3's specs. Also, the W3 has maximum no. of variants with different choices in body material, filter choices, end connection, spring material etc. click here to see variant options in a table W3. click here to see complete catalogue showing specifications.

Body: Brass

Spring/Spring Plate: Spring Steel

Built-in Filter*: SS 316 - 0.4mm

Easy Clean Attachment: No

owder coating on body No

Bannet: Nylon

Warranty: 5 years

W3 - M1NF

Variant Name: W3 - B

Description: W3 is the most commonly used PRV in hi-rise building application as most inlet and outlet pressure needs fall within the W3's specs. Also, the W3 has maximum no. of variants with different choices in body material, filter choices, end connection, spring material etc. click here to see variant options in a table W3. click here to see complete catalogue showing specifications.

Material

Body: Brass Body

Internals: S.S., NBR; Brass; Acetal.

Filter: *Available on request

Bonnet:Nylon.



Range of Application

Medium - Water, Compressed Air, Nitrogen

Inlet Pressure: Maximum 13.0 kg/cm

Max. Temp: 70° C

Connection size: 15,20 mm

End connections: BSP Female threaded

Outlet Pressure: 1.5 to 5.0# kg/cm2

#Higher temperatures & inlet pressures on request.

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