Gate Valve (Cast Steel,Stainless,Cast Iron)

Under maximum differential pressure, maximum allowable Rim pull is 350N

All valve with hand wheels operator, including those on gear operators, be marked openor close with an arrow indicating the direction of rotation.

An available with gear, electric motor actuators, or cylinder actuators for remote operation.

Gate valves normally are to be supplied to complete with the suitable hand wheel.

OPERATORS:

Coarse thread series for bolt sizes 1 inch and smaller, 8-thread series for bolt sizes 11/8 inch and larger, both conform to Class2A/2B tolerances.

BONNET BOLTING:

Calss 900 and over : Ring joint metal gasket

Calss 300 Calss 600 :Jacketed graphite with stainless steel or spiral wound graphite with stainless steel.

Calss 150 : Jacketed graphite with stainless steel.

BONNET GASKET:

Middle rings die-formed 100% laminated flexible graphite rings, top and bottom rings lattice braided graphite fiber with corrosion inhibitor.

Gland has a two-piece construction for easy alignment.

GLAND AND PACKING:

Optional lantern rings and grease injectors are available.

Maximum 125 RMS surface finish. Cylindricity and verticality are precisely controlled according to AOLO design and Manufacturing standards.

STUFFING BOX:

16 to 32 RMS stem surface finish, straightness and roundness are precisely controlled according to AOLO design and Manufacturing standards.

All wedge gate valves are provided with upset forged T-head stems.

Non-rotating stem with precision Acme threads and burnished finish. Acme for faster operation.

STEM:

Provided with bosses for optional by-passes or drains.

Body seat construction of AOLO cast steel valves has three types: threaded seat ring, welded seat ring and integral seat ring .

The surface roughness of gasket grooves of ring joint faces do not exceed 63 micro inch.

The gasket contacting suface is smooth finish that has a roughness between Ra3.2 and 6.3 micrometer(125-250microinch).

BODY  AND  BONNET:

Inspection and test are in accordance with API 598 and BS EN 12266.

BW end dimension conform to ASME B16.25.

End flange dimension conform to ASME B16.5 for sizes NPS 24 and smaller, ASME B16.47 series A for sizes NPS 26 and larger.

Face to face, end to end , and center to face dimension of flanged and butt welded valves are in accordance with ASME B16.10 , BS2080,and ISO 5752.

Wall thinckness dimensions comply with API600..

DESIGN: API600,BS1414,and ASME B16.34

And yoke design

10 and larger valves have a two-piece bonnet

And yoke design

8and smaller valves have a one-piece bonnet

B.W. end to ASME B16.25

28and large to manufactures standard

24and smaller to API600

Shell wall thickness

28and large to ASME B16.47 series

24and smaller to ASME B16.5

Flange dimension:

40 and larger to manufacturers standard

36and smaller to ASME B16.10

Face to face and end to end dimension:

Features:

Body material: ASTM A216 WCB..

Suitable medium:  Water, steam, corrosive media, oil, chemicals, natural gas

Airtight test pressure:0.6MPa
Suitable temperature: -29~425

Seal test pressure: 1.1 times the nominal pressure

Sheel test pressure: 1.5 times the nominal pressure

Nominal pressure:150lb~600lb

Nominal diameter: NPS 8~   NPS48

Technical performance:

Design and manufacture: API 600
Face-to-face : ASME B16.10
Connection end: ASME B16.25
Inspection and test: API 598