Parker / Autoclave Engineers FCD - MVBB Series Block and Bleed Needle Valves

Autoclave series MVBB block and bleed valve is a two stem manifold valve providing an economical and convenient method of blocking, bleeding and calibrating pressure transmitters and gauges. The valve utilizes the mini valve packing and stem design making it compact and easy to use. The valve can be surface or panel mounted for safe operation. In addition, manifold style valves reduce the number of fittings and space required for installation.

Block and Bleed Features:

MVBB Series valve design provides large valve performance in a small package
Tubing sizes: 1/4" and 3/8"
Rising stem/barstock body design.
Metal-to-metal seating achieves bubble-tight shut-off, longer stem/seat life in abrasive flow, greater durability for repeated on/off cycles and excellent corrosion resistance.
PTFE (Teflon) encapsulated packing provides dependable stem and body sealing.
Stem and packing gland design have been selected to achieve extended thread cycle life and reduced handle torque.

Autoclave valves are complemented by a complete line of fittings, tubings and accessories. The MVBB Series uses Autoclave’s medium pressure connections. This coned and threaded connection provides a reliable bubble-tight seal for dependable performance in gas or liquid service.

For complete information on available options, contact your Sales representative. MVBB Series valves are furnished with connection components unless otherwise specified.

For prompt service 'Autoclave stocks select products' Consult factory.
All general terms and conditions of sale, including limitations of our liability, apply to all products and services sold.

Unit of Measure

Items	20MVBB MVBB Series Block and Bleed Needle Valves	20MVBB6 MVBB Series Block and Bleed Needle Valves
Pressure Rating at Room Temperature	N/A 20000 psi1379 bar
Outside Diameter Tube	N/A 1/4 in6.35 mm	N/A 3/8 in9.53 mm
Stem Type	N/A VEE
Connection Type	N/A SF250CX	N/A SF375CX
Orifice Diameter	N/A 0.094 in2.39 mm
A - Length	N/A 3.50 in88.90 mm	N/A 3.88 in98.60 mm
B - Length	N/A 0.813 in20.65 mm	N/A 1.00 in25.40 mm
C - Length	N/A 0.38 in9.65 mm	N/A 0.44 in11.1 mm
D - Height	N/A 0.625 in15.88 mm
D₁ - Height	N/A 0.938 in23.83 mm
E - Height	N/A 1.50 in38.1 mm
F - Length	N/A 1.75 in44.45 mm
G - Packing Gland Mounting Hole Drill Size	N/A 0.56 in14.27 mm
G₁ - Bracket Mounting Hole Size	N/A 0.281 in7.14 mm
H - Height	N/A 2.94 in74.68 mm
M - Length	N/A 2.50 in63.50 mm	N/A 2.88 in73.15 mm
N - Length	N/A 0.485 in12.32 mm	N/A 0.50 in12.70 mm
O - Length	N/A 1.63 in41.40 mm
P - Length	N/A 0.500 in12.70 mm
Q - Width	N/A 2.625 in66.68 mm
Tubing Engagement Depth	N/A 0.55 in14.0 mm	N/A 0.69 in17.6 mm
Rated C_v	N/A 0.20
Valve Options	N/A Extreme Temperatures Standard Autoclave valves with Teflon packing may be operated to 450°F (232°C). High temperature packing is available for service from 0°F (-17.8°C) to 800°F (427°C) by adding the following suffixes to catalog order number. TG standard valve with Teflon glass packing to 600°F (316°C) GY standard valve with Graphite braided yarn packing to 800°F (427°C). For additional valve options, contact your Sales Representative. Note: Refer to the Tools, Installation, Operation and Maintenance section for proper maintenance procedures.