Needle Valve Yoke Series: Large Bore, Reduced Torque 15,000 psi, 43,000 psi, 50,000 psi

 Principle of Operation

Parker Autoclave Engineers (PAE) Yoke Series valves are extra heavy-duty, plant grade instrument valves for industrial and severe service applications. Designed in accordance with ASME B31.3 Chapter IX standards, yoke valves feature a stainless steel yoke frame that removes the stem threads away from any process leakage past the packing and includes a heavy duty bearing assembly providing low closing torque for ease of operation. Yoke Series valves are designed for use with Parker Autoclave Engineers Medium or High Pressure tubing and fittings.

Ordering Guide

Catalog number is created based on customer selection of product parameters, see below for example.

A - Valve Series
15Y: Y Series (Yoke) Needle Valve (3/4" & 1" MP only)
43Y: Y Series (Yoke) Needle Valve (1" HP only)
50Y: Y Series (Yoke) Needle Valve (9/16" HP only)

B - Outside Diameter Tube Size
9: 9/16"
12: 3/4"
16: 1"

C - Stem/Seal Type
07: Non-Rotating Vee Stem (on-off service)
08: Non-Rotating Regulating Stem (tapered tip for regulating and shutoff)
87: Vee Stem with Replaceable Seat (angled valve only)
88: Regulating Stem with Replaceable Seat (angled valve only)

D - Body Pattern
1: 2-Way Straight
2: 2-Way Angle

E - Options Material
TG: PTFE Glass (25%) Packing (-100° to 600°F)
B: Cryogenic (required below 0°F) Trim with and PTFE Packing
GY: High Temperature Graphite Yarn Packing (to 800°F)

For more details see tha full PDF table here

Valve series

Notes
* Cv values shown are for 2-way straight valve pattern. For 2-way angle pattern, increase Cv value 50% (Based on water). Formula for converting Cv to volumetric flow can be found in Technical Information section.
** Maximum Allowable Working Pressure decreases

Medium and High Pressure Yoke Valve Features

• Temperature Rated -100° to 800°F (-73° to 427°C) with options
•  Manufactured as standard with UNS S31600 cold worked 316 stainless steel to PAE proprietary specification
• 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 packing provides below stem threads provide dependable stem and body sealing. Optional packing materials available.
• Stem sleeve and packing gland materials have been selected to achieve extended thread cycle life and reduced handle torque
• Choice of Vee (shutoff) or Flow Regulating stem tips. N-Dura Coating or Stellite® material option for severe service.
•  Available in straight or angle body patterns. Replaceable Seat option available.

Traceability is ensured by use of heat and purchase order codes etched on valve body that also includes model number, MAWP rating, and material type references. All valves include connection collar and gland nut unless requested otherwise. Parker Autoclave Engineers’ Yoke Style valves are complemented by a complete line of Medium and High Pressure Cone & Thread fittings, tubing, check valves, relief valves, and line filters as required.

All Parker Autoclave Engineers products are designed in accordance with ASME B31.3 Chapter IX High Pressure Piping standards.

Valve Packing Options

Standard Parker Autoclave Engineers valves with PTFE packing may be operated from 0°F to 450°F (-18° to 232°C). High and Cryogenic temperature packing and/or extended stuffing box are available for service from -100°F to 600°F (-73° to 315°C) by adding the following suffixes to catalog order number:

• TG: Standard valve with PTFE-Glass packing -100° to 600°F (-73° to 315°C) See also -B option above when below 0°F (-18°C)
• B: Standard valve with Cryogenic trim materials and PTFE packing required when below 0° to -100°F (-18° to -73°C)
• GY: Standard valve with Graphite Yarn packing 32° to 800°F (0° to 427°C)