Bleeder Screw Gauge Valve Series : NVD41

SD GREEN PVT LTD most cost effective Bleeder Screw Gauge Valve Series : NVD41 is having compact and rugged Bar Stock Square Body equipped with a Bleed Screw and Swivel Nut design and construction. This Valve is most suitable for a variety of applications including Instrumentation, Hydraulic and Pneumatic systems.

Features / Benefits :

Low operating torque, Anti blow-out stem.
Stem threads are cold rolled for smooth operation.
Choice of optional stem to provide greater flexibility.
Choice of packing PTFE or Graphite.
Stem packing below the threads, protects the Stem threads from system media.
Orifice size : 4.3mm, 6.3mm and 9.5mm, Flow Coefficient (Cv) from 0.37 to 1.8.
Available in Material SS316, all wetted parts in accordance with NACE MR01-75.
Every Valve is pressure tested.

Product Range & Operating Parameters :

Pressure Rating : UPTO 6000 PSIG (413 Bar) at CWP.
Temperature Rating :
- : -54° C to 232° C with PTFE Packing.
- : -96° C to 426° C with Graphite Packing.
End Connections –
- Fractional : 1/4″ to 1″ Tube OD.
- Metric : 6mm to 16mm Tube OD.
- Pipe Threads : 1/4″ to 3/4″ Male / Female NPT, BSPT, BSP & Socket Weld

Applications :

General Plant Services
Hydraulic & Pneumatic
Instrumentation Isolation,
Pressure Measurement Devices

Stem Type :

SD GREEN PVT LTD Valves are available with choice of optional stem to provide greater flexibility.

Non-Rotating (NR) : It is standard self-centering non-rotating stem tip typically used in high cycle application to extend the Valves life.
‘V’ Stem (VS) : It is used for general purpose liquid and gases.
Soft Seat (SF) : A soft seat stem requires a lower sealing torque. It is replaceable and suitable for temperature UPTO 120^o C.
Regulating Stem (RS) : It is used where some degree of flow control required.

Technical Data :

The temperature and pressure rating for a standard Valve with PTFE packing.

Temperature	Pressure
Temperature	PSIG	Bar
-54^oC to 38^oC	6000	413
-54^oC to 93^oC	5160	351
-54^oC to 148^oC	4660	317
-54^oC to 204^oC	4280	291
-54^oC to 232^oC	4130	289

Type Test Approvals :

The design of SD GREEN PVT LTD Bleeder Screw Gauge Valves Series : NVD31 have been tested to Hydrostatic Proof & Burst Test in accordance to MSS SP-99-2016a Clause 5.5 & 5.6.

Testing :

Standard Test – Each Valve is pressure tested with Nitrogen at 2000 PSIG (138 Bar) for leakage at the seat and packing.
Optional Hydrostatic Test – This Test is performed with De-ionized water at 1.5 times the working pressure.

Certification :

The Certificate to 3.1 acc. to EN10204 for Valves body material and pressure test will be provided on request.

Material of Constructions :

Sr. No.	Part Description	Material
1	Handle	SS316
2	Screw	SS316
3	Valve Stem	SS316
4	Dust Cap	PVC
5	Packing Adjustment Screw	SS316
6	Lock Nut	SS316
7	Bonnet	SS316
8	Washer	SS316
9	Packing	PTFE / Graphite
10	Safety Pin	SS316
11	Valve Body	SS316
12	Swivel Nut	SS316
13	Drain Plug	SS316

Standard Configuration Dimensions :

End Connection – A	Flow Data		Dimensions in mm\					SD GREEN PVT LTD Part No.
End Connection – A	Orifice(mm)	Cv	B	E	F	A/F1	A/F2	SD GREEN PVT LTD Part No.
1/4″ BSP (Male x Swivel Nut)	3.2	0.25	80.0	79.0	54.0	25.40	19.0	NVD41-MF4G
1/2″ BSP (Male x Swivel Nut)	4.3	0.37	100.0	84.0	58.0	31.75	27.0	NVD41-MF8G
M20 x 1.5 (Male x Swivel Nut)	4.3	0.37	100.0	84.0	58.0	31.75	27.0	NVD41-MF20M
1/2″ BSP x M22 x 1.5 (Male x Swivel Nut)	4.3	0.37	100.0	84.0	58.0	31.75	27.0	NVD41-M8G-22M

Dimensions are for reference only and are subject to change.