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  • Giacomini ball valve full bore brass thread 1/2''
SKU: R851X023

Giacomini ball valve full bore brass thread 1/2''

R851 - full bore ball, female/female thread, chrome plated, red butterfly handle. Chrome-plated coating provides corrosion protection, high wear resistance and high temperature resistance. Giacomini R851 taps have an attractive price, compact size and high strength, they are high-reliability fittings. The stem sealing technology with 2 seals and 2 anti-friction Teflon gaskets is the most advanced in the industry and ensures 100% tightness of the assembly throughout the life of the valve.


Full bore ball valves guarantee a through hole corresponding to the diameter of the pipeline. The advantages inherent in full bore ball valves are that there is no hydraulic resistance, and, accordingly, there is no pressure loss in the pipeline.

Another important characteristic of ball valves is the ability to reliably shut off gas or liquid flows. In comparison with various similar designs, the ball valve copes with this task best of all. In addition, the closing of the ball valve is carried out by simply turning the lever by 90 degrees, which greatly simplifies the control of this mechanism. There is no need to rotate the flywheel, or any other turning mechanism around its axis for several circles in a row.


Technical characteristics of ball valves Giacomini R851:

  • Maximum operating conditions on dry saturated steam: 185°C at 1.05 MPa (10.5 bar).
  • Maximum operating pressure for water and non-hazardous gases:
  • 3.5 MPa (35 bar) for 3/8” – 3/4” valves
  • 2.8MPa (28 bar) for 1” – 1”1/4 valves
  • Maximum operating pressure (MOP) with gas: 0.5 MPa (5 bar).
  • Maximum working pressure when working with liquid hydrocarbons: 1.2 MPa (12 bar).
  • Materials:
  • Body: brass, hot forged CW617N - EN 12165, chrome plated
  • Coupling: brass, hot forged CW617N - EN 12165, chrome plated
  • Stem: made of brass rods CW614N - EN 12164, with anti-friction rings inside and outside and double sealed gasket
  • Sphere: CW617N brass, chrome plated
  • Gaskets: low friction PTFE
  • Handle: Painted aluminum butterfly handle
  • Nut: DACROMET with warranty seal and hologram


Distinctive features of Giacomini taps:

Giacomini valves feature a unique stem seal design. The valves use four gaskets - a pair of FKM o-rings and two Teflon flat gaskets - to provide shock protection and reduce friction when turning the valve. Double sealing ensures the tightness of the assembly during the entire life of the valve, without the need to pull or repair the connection.
Such a non-separable connection allows you to fix the handle fastening nut with a plastic seal.


Giacomini ball valves are high reliability valves. Designed to work in the most severe conditions, at high pressure and temperature, they withstand significant mechanical loads. The use of the most resistant and durable materials makes it possible to achieve a long service life, ensuring the tightness of all crane assemblies and their performance. Technology and 60 years of experience in the production of ball valves allow us to produce products that are unique in their design. At the same time, Giacomini ball valves are available to a wide range of professionals and consumers, allowing the use of valves of the highest degree of reliability and quality both in special systems and in everyday life.

Products are certified in accordance with modern quality standards ISO 9001 and ISO 14001, BS British Gas, etc.

  • SKU R851X023
    Gross weight 0,13 kg
    Type ball valve
    Handle type Butterfly
    Connection type Thread
    Passages full bore
    Thread Internal
    Working space Water
    Purpose Heating, Water supply
    Objects of application For pipes
    Thread diameter 1/2”
    Material Brass
    Coating Chromium
    Maximum working temperature 185 C
    Maximum working pressure 35 bar
    Colours Silver
    Trumpet single socket
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