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250 - Valve Packing Demonstrator

Product Dimensions
(L x W x H)
13.5in. x 13.5in. x 36in. (340 x 340 x 910 mm)
31lbs. (14kg)

Shipping Dimensions
(L x W x H)
15in. x 22in. x 30in. (380 x 560 x 760 mm)
60lbs. (28kg)

A detailed replica of a 6in. gate valve, with backseat, which facilitates training in the proper removal and installation of packing.

A clear acrylic stuffing box allows total visibility of the packing area, both during maintenance activities and after compression. The natural magnification created by the acrylic housing shows consolidation and packing pressure against the cavity wall clearly. Water and coloring can be introduced to see migration due to insufficient gland load, improper installation techniques and stem/cavity imperfections. Allows for convenient demonstration of live-loaded packing and the use of die-formed graphite packing, as well as conventional packing materials.
Patterned after a 6", 600 lb. Anchor/Darling pressure seal gate valve with backseat.
Clear acrylic "bonnet" with 2.250" dia. x 5.125" deep packing chamber.
Aluminum simulated valve body and yoke assembly.
1.5" diameter aluminum working stem machined to 32 RMS with 2" travel.
3/4" "NH" (hose) drain, and lantern ring bleed-off connections.
7-Gauge, formed-steel baseplate, with provision for table-top mounting.
Aluminum gland and follower.
Nylon backseat.
Aluminum lantern ring.
Crating for shipment via motor freight.
#250-001 - Additional standard, braided, precut packing set.
#250-002 - Bulk braided packing (12 ft. spool).
#250-005 - Die-formed graphite, ribbon tape, square cross section, packing ring set with braided graphite in.anti-extrusionin. end rings and split carbon spacer.
#250-006 - Complete in.live-loadingin. package including die-formed packing, end rings, simulated split carbon spacer, , Belleville washer set, and technical information.
#250-009 - Heavy-duty, foam-lined, reusable packing container.
#250-010 - One-piece gland (aluminum).
#250-011 - Standard split spacer for standard packing.
#250-012 - Commercial surface specimen (thumb nail block).
#250-013 - Dial-type Torque Wrench w/socket.
#250-PAC - Valve Packing Demonstrator, Quick-Start Pkg, including: #250, #250-001, #250-002, #250-010, #250-011
* Inspection mirror. * Standard set of PTFE type, 3/8in., braided, non-asbestos packing. * Two 10in. long packing pullers. * Two 10in. long lantern ring pullers. * 6in. pocket depth scale. * Twenty tablets non-toxic coloring. * Two standard Garlock gaskets. * 1.5in. diameter x 12in. long PVC cutting mandrel for packing ring fabrication. * Crocus cloth. * Packing pusher/driver. * Six pairs of plastic disposable gloves. * Plastic tool box. * Packaging for shipment via UPS or motor freight.
Water (optional)
The courseware, useful in both an instructor-led or self-directed format, includes a course guide on valve packing, and seven, illustrated, hands-on exercises.

Exercises include:


Exercise 250-S01 - Introduction to the DAC #250 Valve Packing Demonstrator
Exercise 250-S02 - Performing Valve Component Inspections
Exercise 250-S03 - Introduction to Compression Packing
Exercise 250-S04 - Packing a Valve with Compression Packing and Lantern Ring
Exercise 250-S05 - Repack a Valve using Braided Packing and a Stuffing Box Spacer
Exercise 250-S06 - Repack a Valve with a Die-Formed Packing Set
Exercise 250-S07 - Retrofit a valve with a Live Loading Valve Stem Gland Assembly


This device has been designed for professionals for use under controlled circumstances for training only. DAC assumes no liability for injury resulting from the use or misuse of this product.