Description

Instrument Monoflanges

AS-Schneider Instrument Monoflanges are close coupled to a pre-installed primary isolation valve to provide a compact instrument Double Block and Bleed Valve or are used when primary isolation valves with an OS & Y Bolted Bonnet are not required. The needle valves of the Instrument Monoflanges are provided with a screwed bonnet. The Standard Pressure Instrument Connection is 1/2 NPT female, the Standard Process Connections are provided by Flange Connections acc. to ASME B 16.5. AS-Schneider is providing axial, radial or dual outlet types for either Horizontal or Vertical Flange Mounting.

The Monoflanges are available as Block, Block & Bleed or Double Block & Bleed designs.

A diverse range of options and the relevant accessories are available, please see below Mounting Bracket Kits and Accessories.

Connections, materials, valve head unit designs and further options are available, please see below Ordering Information or more detailed under:

General InformationExample for a typical product acc. to the below mentioned Ordering Information:

Part No.: MNA-NDALN4-SC

MN	Instrument Monoflange, Block & Bleed Type
A	Packing: PTFE
-
ND	ASME Flange Size: 3/4", RF
A	ASME Flange Class: 150
LN4	Outlet Connection: 1/2 NPT Female
-
S	Material: 1.4401 / 1.4404 / 316 / 316L
C	Vent Connection: 1/4 NPT Female

Instrument Monoflanges - Weights and Dimensions

Block Block & Bleed Double Block & Bleed

Instrument Monoflanges Drawing (arrangement) 1

Flange x ThreadMS

Flange Size (in)	Flange Class	ØD (mm)	Flange Face		Approx. Weight (kg)
Flange Size (in)	Flange Class	ØD (mm)	RF x mm	RTJ x mm	Approx. Weight (kg)
1/2	150	88.9	33.6	-	1.6
1/2	300	95.3	33.6	37.6	2.0
1/2	600	95.3	38.4	37.6	2.0
1/2	900 / 1,500	120.7	38.4	38.4	2.9
1/2	2,500	133.4	38.4	38.4	3.7
3/4	150	98.6	33.6	-	2.0
3/4	300	117.3	33.6	38.4	2.9
3/4	600	117.3	38.4	38.4	2.9
3/4	900 / 1,500	130.0	38.4	38.4	3.5
3/4	2,500	139.7	39.4	39.4	4.2
1	150	108.0	36.6	38.4	2.6
1	300	124.0	36.6	38.4	3.3
1	600	124.0	38.4	38.4	3.3
1	900 / 1,500	149.3	38.4	38.4	6.8
1	2,500	158.8	42.4	42.4	5.7
1 1/2	150	127.0	36.6	38.4	3.8
1 1/2	300	155.4	36.6	38.4	5.3
1 1/2	600	155.4	38.4	38.4	5.3
1 1/2	900 / 1,500	177.8	39.4	39.4	6.8
1 1/2	2,500	203.2	51.4	52.9	11.5
2	150	152.4	36.6	38.4	5.1
2	300	165.1	36.6	39.9	5.7
2	600	165.1	38.4	39.9	6.2
2	900 / 1,500	215.9	45.4	46.9	11.6
2	2,500	235.0	58.4	59.9	17.0

Ordering Information

Mounting Bracket Kits and Accessories

Compact Gauge Syphons	Pipe Plugs
Swivel Gauge Adapters	Hex NipplesHN Type
Vent ValvesVS or VT Type

Further InformationAS-Schneider Instrument Monoflanges are close coupled to a pre-installed primary isolation valve to provide a compact instrument block and bleed valve or are used when primary isolation valves with an OS & Y bolted bonnet are not required. The Needle Valves of the Instrument Monoflanges are provided with a screwed bonnet. The Standard Pressure Instrument Connection is 1/2 NPT female, the Standard Process Connections are provided by Flange Connections acc. to ASME B 16.5. AS-Schneider is providing axial, radial or dual outlet types for either Horizontal or Vertical Flange Mounting. The innovative design of the valve head units gives long service life and a smooth, low-torque operation. The AS-Schneider Monoflanges, as standard, are rated to 420 bar (6,092 psi). AS-Schneider also provides the Monoflanges for sour gas service (acc. to NACE MR0175/MR0103 and ISO 15156), degreased and lubricated for oxygen service as well as Monoflanges for fugitive emission applications.

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