804-MB 1/2 NPT, Male, Brass, Hard Seat Bleed Valve
800/850 Series Bleed, Hard Seat & Soft Tip Needle Valves
[800/850 Series Bleed, Hard Seat & Soft Tip Needle Valves]
Bleed valves provide a convenient means to relieve process pressures
trapped between a shut off valve and the instrument
Uses the same bonnet assemblies of the 100/150 Series mini valves with
an integrated single threaded body for insertion in vent port
Soft tip valves feature a patented Delrin® non-rotating soft tip stem, and
a back-up metal-to-metal seal (U.S. Patent 6,820,857)
100% helium leak tested to 1 x 10-4 ml/s for guaranteed performance and
reliability 10,000 psi hard seat pressure rating @ 200 °F
Available in zinc-nickel plated steel, electropolished stainless steel, and brass
FKM o-ring seal and PTFE back-up ring below the stem threads to protect
from corrosion and galling; PTFE or Grafoil® (800 Series only) packing optional
All stems are 316 stainless steel
All stem threads are rolled for strength and ease of operation
0.159" bleed port
Patented body-to-bonnet, metal-to-metal seal is designed to significantly
increase the pressure range of the valve (U.S. Patent 7,758,014)
Dimensions Options Print Catalog Page
Product Specifications Reference Information Trademark Information
Options Reference Chart
SERIES 8 800/850 Series, hard seat/soft tip
CONNECTION SIZES 02 Hard seat 1/4" NPT 52 Delrin® soft tip 1/4" NPT
04 Hard seat 1/2" NPT 54 Delrin® soft tip 1/2" NPT
VALVE TYPES MC Male, Steel MS Male, Stainless Steel MB Male, Brass
Please consult your local NOSHOK Distributor or NOSHOK, Inc. for availability and delivery information.
[800/850 Series Bleed, Hard Seat & Soft Tip Needle Valves Part Number Diagram]
To meet all of your specific application requirements, the following additional options are available for these needle valves. To order all or any of these options, simply add them to the part number as shown in the diagram below.
NOTE 1: The example shown includes ALL possible additional options. Please include ONLY the options required for your application when building your part number. (EXAMPLE: 802-MC-EM1)
NOTE 2: When a packing option is selected, an o-ring option is NOT available.
ORDERING INFORMATION - Additional Options
PACKINGS† P1 PTFE P2 Grafoil®**
STEM TIPS T1 Non-rotating (316 stainless) T4 PEEK*** T7 Ball (ceramic)**
T2 Delrin® (Acetal )*** T5 Ball (440C stainless)** T8 Ball (Monel)**
T3 PCTFE*** T6 Ball (carbide)**
O-RINGS* EM1 EPDM KZ1 FFKM (Kalrez® 3018 or equivalent) NB1 NBR
HANDLES HL2 2-1/2" "T"** HL4 1-3/8" Phenolic** HL5 1-3/4" Phenolic**
HL3 1" Round knurled
† If a packing option is chosen, maximum pressure rating is 6,000 psi. Refer to the "Pressure vs Temperature: Packing Style with Compatible Fluid" chart.
* Other o-ring materials available on request.
** For 800 Series only.
*** For 850 Series only.
Please note that the standard o-ring in all the NOSHOK valves is FKM and the standard handles are 1" round knurled handles (HL3) on brass, and 1-3/8" mini "T" handles (HL7) on stainless steel and steel.
The handle material will always match the material of the valve, unless otherwise specified. For example, the mini "T" handle (HL7) on the 802-MC will be steel. When only the standard configuration is needed, no additional designations are necessary. Please consult the factory for special application requests.
[800/850 Series Bleed, Hard Seat & Soft Tip Needle Valves Ordering Information Additional Options Chart]
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