PREFACE
BLAST MACHINES AND REMOTE CONTROLS
OSHA regulation 1910.169 describes the necessity of pressure relief valves on compressed air equipment. Do not
operate blast machines with air compressors that are not equipped with properly functioning pressure relief valves.
OSHA regulation 1910.244(b) requires the use of remote controls on blast machines.
Serious injury or death can result from many sources, among them:
Involuntary activation of the remote controls. Never modify or substitute remote control parts; parts are not
compatible among different manufacturers. Welding hose is not suitable for remote control hose. Its ID and material
composition make it unsafe for remote control use.
Exceeding the maximum working pressure. Clemco blast machines are built to ASME-code and carry a ‘U’ or ‘UM’
stamp, and National Board/serial number. Every machine is marked with its maximum working pressure. Never
exceed the maximum working pressure limits of the blast machine.
Uncontrolled blast stream. High-velocity abrasive particles will inflict serious injury. Always point the blast nozzle
in the direction of the blast surface only. Keep unprotected workers out of the blast area.
Welding on the blast machine. Never weld on the blast machine; welding voids the National Board approval and
may affect the dimensional integrity of the vessel.
Moving the blast machine. Never manually move a blast machine containing abrasive, any machine containing
abrasive must be moved with appropriate mechanical lifting equipment.
HOSES, COUPLINGS, AND NOZZLE HOLDERS
The inside diameter (ID) of air hoses, fittings, and connections
should be at least four times larger than the nozzle orifice size. Blast
hose ID should be three to four times the size of the nozzle orifice.
Example: a #6 nozzle (3/8” diameter orifice) calls for 1-1/2” ID blast
hose and 1-1/2” ID or larger compressor hose. All hose runs should be
kept as short as possible and run in as straight a line as possible to
reduce pressure loss.
To install, squarely cut the end of the hose so that it fits snugly
against the coupling or hose end shoulder. Always use the screws
recommended by the manufacturer ensuring that they do not
penetrate the inner wall. Make sure the couplings tightly fit the hose.
Install cotter pins at every connection or use couplings with built-in
lock-springs to prevent disengagement. Install safety cables at all
connections to prevent whipping if hoses disengage or blow out.
MAINTENANCE AND REPAIR
Completely read and follow all service instructions and recommended maintenance intervals. Always shut off compressor and
depressurize blast machine before performing any maintenance. At every service interval, clean all filters, screens, and alarm systems. If
spring-loaded abrasive valves are used, always cage spring before disassembly.
WARRANTY
The following is in lieu of all warranties, express, implied or statutory, and in no event shall seller or its agents, successors, nominees or
assignees, or either, be liable for special or consequential damage arising out of a breach of warranty. This warranty does not apply to any damage or
defect resulting from negligent or improper assembly or use of any item by the buyer or its agent or from alteration or attempted repair by any person
other than an authorized agent of seller. All used, repaired, modified, or altered items are purchased “as is” and with all faults. In no event shall seller
be liable for consequential or incidental damages. The sole and exclusive remedy of buyer for breach of warranty by seller shall be repair or
replacement of defective parts or, at seller’s option, refund of purchase price, as set forth below
:
1. Seller makes no warranty with respect to products used other than
in accordance hereunder.
2. On products seller manufactures, seller warrants that all products are to
be free from defects in workmanship and materials for a
period of one year from date of shipment to buyer, but no warranty is
made that the products are fit for a particular purpose.
3. On products which seller buys and resells pursuant to this order, seller
warrants that the products shall carry the then standard warranties of the
manufacturers thereof, a copy of which shall be made available to the
customer upon request.
4. The use of any sample or model in connection with this order is for
illustrative purposes only and is not to be construed as a warranty that the
product will conform to the sample or model.
5. Seller makes no warranty that the products are delivered free of the
rightful claim of any third party by way of patent infringement or the like.
6. This warranty is conditioned upon seller’s receipt within ten (10)
days after buyer’s discovery of a defect, of a written notice stating in
what specific material respects the product failed to meet this
warranty. If such notice is timely given, seller will, at its option, either
modify the product or part to correct the defect, replace the product or
part with complying products or parts, or refund the amount paid for
the defective product, any one of which will constitute the sole liability
of the seller and a full settlement of all claims. No allowance will be
made for alterations or repairs made by other than those authorized
by seller without prior written consent of seller. Buyer shall afford
seller prompt and reasonable opportunity to inspect the products for
which any claim is made as above stated.
Except as expressly set forth above, all warranties, express, implied
or statutory, including implied warranty of merchantability, are
hereby disclaimed.
