This is a partial report of experimental work conducted on a 13-inch gas pulsator in order to investigate various methods of extending valve life. Previous investigation of Eichelberg valves found that 0.010-inch steel vanes lasted 32 minutes, 0.006-inch steel vanes lasted 6 minutes, 0.008-inch steel vanes lasted 65 minutes, 0.012-inch steel vanes ground to 0.008-inch for portion of length lasted 45 minutes, and doubled 0.006-inch steel vanes lasted 24 minutes. This work found that 48 special "sandwich" valves of plastic-impregnated glass-cloth between spring steel lasted for a total running time of 6 hours and 25 minutes. This laminated valve consisted of an 0.008-inch springs-teel vane on the striking side, a 0.006-inch spring-steel vane on the combustion side, and an insert of ethyl-cellulose-coated glass-cloth between the two steel vanes. This insert cushioned impact shock and insulated the striking vane from the heat of the combustion chamber. Other methods of extending vane life are discussed. Plans for future work include measurements of pressure, temperature, and frequency in addition to studies of methods to improve thermal efficiency.